Update changes

Author: CompetitiveLin

README.md

@@ -26,6 +26,7 @@
 
 | 最近提交时间 | 题目 | 题目难度 | 提交次数| 重刷次数 |
 | ---- | ---- | ---- | ---- | ---- |
+| 2024-03-19 19:39 | [#1838 最高频元素的频数](https://leetcode.cn/problems/frequency-of-the-most-frequent-element) | MEDIUM | 1 | 1 |
 | 2024-03-18 14:24 | [#658 找到 K 个最接近的元素](https://leetcode.cn/problems/find-k-closest-elements) | MEDIUM | 4 | 1 |
 | 2024-03-18 11:20 | [#187 重复的DNA序列](https://leetcode.cn/problems/repeated-dna-sequences) | MEDIUM | 2 | 1 |
 | 2024-03-15 14:19 | [#2487 从链表中移除节点](https://leetcode.cn/problems/remove-nodes-from-linked-list) | MEDIUM | 1 | 1 |