fixed: fixed error in linked list README.ko-KR (trekhleb#820)

YumYumNyang · trekhleb · web-flow · commit 41ace46d4809 · 2022-01-22T10:11:41.000+01:00
Co-authored-by: Oleksii Trekhleb &lt;trehleb@gmail.com&gt;
diff --git a/src/data-structures/linked-list/README.ko-KR.md b/src/data-structures/linked-list/README.ko-KR.md
@@ -137,7 +137,7 @@ end ReverseTraversal
 
 |  접근   |  탐색   |  삽입   |  삭제   |
 | :---: | :---: | :---: | :---: |
-| O(n)  | O(n)  | O(1)  | O(1)  |
+| O(n)  | O(n)  | O(1)  | O(n)  |
 
 ### 공간 복잡도
 
