40.组合总和II python代码块 注释修改

problems/0040.组合总和II.md

@@ -296,7 +296,7 @@ class Solution {
 }
 ```
 Python：
-```py
+```python
 class Solution:
     def combinationSum2(self, candidates: List[int], target: int) -> List[List[int]]:
         res = []