Update README.md

快手算法：链表求和

Author: sisterAn

README.md

@@ -59,6 +59,7 @@
 - [leetcode19：删除链表倒数第 n 个结点](https://github.com/sisterAn/JavaScript-Algorithms/issues/16)
 - [图解字节&leetcode160：编写一个程序，找到两个单链表相交的起始节点](https://github.com/sisterAn/JavaScript-Algorithms/issues/17)
 - [腾讯&leetcode611：有效三角形的个数](https://github.com/sisterAn/JavaScript-Algorithms/issues/93)
+- [快手算法：链表求和](https://github.com/sisterAn/JavaScript-Algorithms/issues/114)
 
 #### 字符串
 - [字节&leetcode151：翻转字符串里的单词](https://github.com/sisterAn/JavaScript-Algorithms/issues/18)