Update changes

Author: CompetitiveLin

README.md

@@ -123,7 +123,7 @@
 | 2024-01-20 13:17 | [#373 查找和最小的 K 对数字](https://leetcode.cn/problems/find-k-pairs-with-smallest-sums) | MEDIUM | 3 | **2** |
 | 2024-01-18 10:52 | [#148 排序链表](https://leetcode.cn/problems/sort-list) | MEDIUM | 1 | 1 |
 | 2024-01-03 09:18 | [#15 三数之和](https://leetcode.cn/problems/3sum) | MEDIUM | 7 | **3** |
-| 2023-12-29 15:53 | [#230 二叉搜索树中第K小的元素](https://leetcode.cn/problems/kth-smallest-element-in-a-bst) | MEDIUM | 1 | 1 |
+| 2023-12-29 15:53 | [#230 二叉搜索树中第 K 小的元素](https://leetcode.cn/problems/kth-smallest-element-in-a-bst) | MEDIUM | 1 | 1 |
 | 2023-12-29 15:01 | [#78 子集](https://leetcode.cn/problems/subsets) | MEDIUM | 2 | 1 |
 | 2023-12-26 22:24 | [#1143 最长公共子序列](https://leetcode.cn/problems/longest-common-subsequence) | MEDIUM | 2 | 1 |
 | 2023-12-24 12:30 | [#567 字符串的排列](https://leetcode.cn/problems/permutation-in-string) | MEDIUM | 3 | 1 |