📝 Update 0344.反转字符串.md with python3

problems/0344.反转字符串.md

@@ -250,6 +250,20 @@ class Solution:
         s[:] = [s[i] for i in range(len(s) - 1, -1, -1)]
        
 ```
+
+（版本七） 使用reverse()
+
+```python
+class Solution:
+    def reverseString(self, s: List[str]) -> None:
+        """
+        Do not return anything, modify s in-place instead.
+        """
+        # 原地反转,无返回值
+        s.reverse()
+       
+```
+
 ### Go：
 
 ```Go