Update README.md

Author: zzzhangboya

README.md

@@ -42,7 +42,7 @@
 ### 算法思维 🦁
 
 - [递归思维√](./advanced_algorithm/recursion.md)
-- [滑动窗口思想](./advanced_algorithm/slide_window.md)
+- [滑动窗口思想√](./advanced_algorithm/slide_window.md)
 - [二叉搜索树](./advanced_algorithm/binary_search_tree.md)
 - [回溯法](./advanced_algorithm/backtrack.md)