fix: update readme guideline in basic directory (#1151)

Author: EthanCai

basic/README.md

@@ -4,6 +4,7 @@
 
 -   [冒泡排序](/basic/sorting/BubbleSort/README.md)
 -   [插入排序](/basic/sorting/InsertionSort/README.md)
+-   [希尔排序](/basic/sorting/ShellSort/README.md)
 -   [选择排序](/basic/sorting/SelectionSort/README.md)
 -   [归并排序](/basic/sorting/MergeSort/README.md)
 -   [快速排序](/basic/sorting/QuickSort/README.md)

basic/README_EN.md

@@ -4,11 +4,12 @@
 
 -   [Bubble Sort](/basic/sorting/BubbleSort/README.md)
 -   [Insertion Sort](/basic/sorting/InsertionSort/README.md)
+-   [Shell Sort](/basic/sorting/ShellSort/README.md)
 -   [Selection Sort](/basic/sorting/SelectionSort/README.md)
 -   [Merge Sort](/basic/sorting/MergeSort/README.md)
 -   [Quick Sort](/basic/sorting/QuickSort/README.md)
--   [Shell Sort](/basic/sorting/ShellSort/README.md)
 -   [Heap Sort](/basic/sorting/HeapSort/README.md)
+-   [Counting Sort](/basic/sorting/CountingSort/README.md)
 
 ## Searching
 

basic/summary.md

@@ -2,9 +2,11 @@
     -   排序算法
         -   [冒泡排序](/basic/sorting/BubbleSort/README.md)
         -   [插入排序](/basic/sorting/InsertionSort/README.md)
+        -   [希尔排序](/basic/sorting/ShellSort/README.md)
         -   [选择排序](/basic/sorting/SelectionSort/README.md)
         -   [归并排序](/basic/sorting/MergeSort/README.md)
         -   [快速排序](/basic/sorting/QuickSort/README.md)
         -   [堆排序](/basic/sorting/HeapSort/README.md)
+        -   [计数排序](/basic/sorting/CountingSort/README.md)
     -   查找算法
         -   [二分查找](/basic/searching/BinarySearch/README.md)