Update README.md

Author: azl397985856

README.md

@@ -136,7 +136,7 @@ leetcode 题解，记录自己的 leetcode 解题之路。
 - [数据结构](./thinkings/basic-data-structure.md)
 - [基础算法](./thinkings/basic-algorithm.md)
 - [二叉树的遍历](./thinkings/binary-tree-traversal.md) 🖊
-- [动态规划](./thinkings/dynamic-programming.md)
+- [动态规划](./thinkings/dynamic-programming.md) 🖊
 - [哈夫曼编码和游程编码](./thinkings/run-length-encode-and-huffman-encode.md)
 - [布隆过滤器](./thinkings/bloom-filter.md)
 - [字符串问题](./thinkings/string-problems.md)