fix: update comment of day35 46

fix: update comment of day35 46

Author: hj.tian

leetcode75/day35_46.py

@@ -10,7 +10,7 @@ def permute(self, nums: List[int]) -> List[List[int]]:
 
 # class Solution:
 # def permute(self, nums: List[int]) -> List[List[int]]:
-# """3. 搜索+
+# """3. 搜索+回溯
 
 # 1 2 3
 # 2 3