fix README.md mistake

Author: P-ppc

README.md

@@ -16,5 +16,5 @@ All solutions will be accepted!
 |557|[Reverse Words In A String III](https://leetcode-cn.com/problems/reverse-words-in-a-string-iii/description/)|[java/py/js](./algorithms/ReverseWordsInAStringIII)|Easy|
 |104|[Maximum Depth Of Binary Tree](https://leetcode-cn.com/problems/maximum-depth-of-binary-tree/description/)|[java/py/js](./algorithms/MaximumDepthOfBinaryTree)|Easy|
 |617|[Merge Two Binary Trees](https://leetcode-cn.com/problems/merge-two-binary-trees/description/)|[java/py/js](./algorithms/MergeTwoBinaryTrees)|Easy|
-|226|[Invert Binary Tree](https://leetcode-cn.com/problems/invert-binary-tree/description/)|[java/py/js]|(./algorithms/InvertBinaryTree)|Easy|
+|226|[Invert Binary Tree](https://leetcode-cn.com/problems/invert-binary-tree/description/)|[java/py/js](./algorithms/InvertBinaryTree)|Easy|
 |693|[Binary Number With Alternating Bits](https://leetcode-cn.com/problems/binary-number-with-alternating-bits/description/)|[java/py/js](./algorithms/BinaryNumberWithAlternatingBits)|Easy|