docs: add space complexity of string[::-1]

Chaedie · Chaedie · commit dd26a7e5e6b5 · 2024-12-10T07:58:50.000+09:00
diff --git a/valid-palindrome/Chaedie.py b/valid-palindrome/Chaedie.py
@@ -14,6 +14,7 @@
 
 공간 복잡도: 
     1) string 배열 - O(n)
+    2) string[::-1] - O(n)
 
     결론: O(n) 입니다.
 """
