update readme

Author: hogan-tech

.github/Question List.txt

@@ -10,4 +10,6 @@
 1669-merge-in-between-linked-lists python medium
 0073-set-matrix-zeroes python medium
 0234-palindrome-linked-list python easy
-1119-remove-vowels-from-a-string python easy
+1119-remove-vowels-from-a-string python easy
+0143-reorder-list python medium
+0021-merge-two-sorted-lists javascript easy

README.md

@@ -49,7 +49,7 @@ The solutions are organized as follows:
 | 0018 | [4Sum](https://leetcode.com/problems/4sum/)                                                                                                                         | [Python](./0018-4sum/0018-4sum.py)                                                                                                                                                                                                                                             | [Medium](./0018-4sum/README.md)                                                           |
 | 0019 | [Remove Nth Node From End of List](https://leetcode.com/problems/remove-nth-node-from-end-of-list/)                                                                 | [Python](./0019-remove-nth-node-from-end-of-list/0019-remove-nth-node-from-end-of-list.py), [C++](./0019-remove-nth-node-from-end-of-list/0019-remove-nth-node-from-end-of-list.cpp)                                                                                           | [Medium](./0019-remove-nth-node-from-end-of-list/README.md)                               |
 | 0020 | [Valid Parentheses](https://leetcode.com/problems/valid-parentheses/)                                                                                               | [Python](./0020-valid-parentheses/0020-valid-parentheses.py), [C++](./0020-valid-parentheses/0020-valid-parentheses.cpp), [JavaScript](./0020-valid-parentheses/0020-valid-parentheses.js)                                                                                     | [Easy](./0020-valid-parentheses/README.md)                                                |
-| 0021 | [Merge Two Sorted Lists](https://leetcode.com/problems/merge-two-sorted-lists/)                                                                                     | [Python](./0021-merge-two-sorted-lists/0021-merge-two-sorted-lists.py), [C++](./0021-merge-two-sorted-lists/0021-merge-two-sorted-lists.cpp)                                                                                                                                   | [Easy](./0021-merge-two-sorted-lists/README.md)                                           |
+| 0021 | [Merge Two Sorted Lists](https://leetcode.com/problems/merge-two-sorted-lists/)                                                                                     | [Python](./0021-merge-two-sorted-lists/0021-merge-two-sorted-lists.py), [C++](./0021-merge-two-sorted-lists/0021-merge-two-sorted-lists.cpp), [Javascript](./0021-merge-two-sorted-lists/0021-merge-two-sorted-lists.js)                                                       | [Easy](./0021-merge-two-sorted-lists/README.md)                                           |
 | 0022 | [Generate Parentheses](https://leetcode.com/problems/generate-parentheses/)                                                                                         | [Python](./0022-generate-parentheses/0022-generate-parentheses.py)                                                                                                                                                                                                             | [Medium](./0022-generate-parentheses/README.md)                                           |
 | 0023 | [Merge k Sorted Lists](https://leetcode.com/problems/merge-k-sorted-lists/)                                                                                         | [Python](./0023-merge-k-sorted-lists/0023-merge-k-sorted-lists.py)                                                                                                                                                                                                             | [Hard](./0023-merge-k-sorted-lists/README.md)                                             |
 | 0026 | [Remove Duplicates from Sorted Array](https://leetcode.com/problems/remove-duplicates-from-sorted-array/)                                                           | [Python](./0026-remove-duplicates-from-sorted-array/0026-remove-duplicates-from-sorted-array.py)                                                                                                                                                                               | [Easy](./0026-remove-duplicates-from-sorted-array/README.md)                              |
@@ -121,6 +121,7 @@ The solutions are organized as follows:
 | 0138 | [Copy List with Random Pointer](https://leetcode.com/problems/copy-list-with-random-pointer/)                                                                       | [Python](./0138-copy-list-with-random-pointer/0138-copy-list-with-random-pointer.py)                                                                                                                                                                                           | [Medium](./0138-copy-list-with-random-pointer/README.md)                                  |
 | 0139 | [Word Break](https://leetcode.com/problems/word-break/)                                                                                                             | [Python](./0139-word-break/0139-word-break.py)                                                                                                                                                                                                                                 | [Medium](./0139-word-break/README.md)                                                     |
 | 0141 | [Linked List Cycle](https://leetcode.com/problems/linked-list-cycle/)                                                                                               | [Python](./0141-linked-list-cycle/0141-linked-list-cycle.py), [C++](./0141-linked-list-cycle/0141-linked-list-cycle.cpp)                                                                                                                                                       | [Easy](./0141-linked-list-cycle/README.md)                                                |
+| 0143 | [Reorder List](https://leetcode.com/problems/reorder-list/)                                                                                                         | [Python](./0143-reorder-list/0143-reorder-list.py)                                                                                                                                                                                                                             | [Medium](./0143-reorder-list/README.md)                                                   |
 | 0144 | [Binary Tree Preorder Traversal](https://leetcode.com/problems/binary-tree-preorder-traversal/)                                                                     | [Python](./0144-binary-tree-preorder-traversal/0144-binary-tree-preorder-traversal.py), [C++](./0144-binary-tree-preorder-traversal/0144-binary-tree-preorder-traversal.cpp), [JavaScript](./0144-binary-tree-preorder-traversal/0144-binary-tree-preorder-traversal.js)       | [Easy](./0144-binary-tree-preorder-traversal/README.md)                                   |
 | 0145 | [Binary Tree Postorder Traversal](https://leetcode.com/problems/binary-tree-postorder-traversal/)                                                                   | [Python](./0145-binary-tree-postorder-traversal/0145-binary-tree-postorder-traversal.py), [C++](./0145-binary-tree-postorder-traversal/0145-binary-tree-postorder-traversal.cpp), [JavaScript](./0145-binary-tree-postorder-traversal/0145-binary-tree-postorder-traversal.js) | [Easy](./0145-binary-tree-postorder-traversal/README.md)                                  |
 | 0148 | [Sort List](https://leetcode.com/problems/sort-list/)                                                                                                               | [Python](./0148-sort-list/0148-sort-list.py)                                                                                                                                                                                                                                   | [Medium](./0148-sort-list/README.md)                                                      |