Update README.md

Geekhyt · web-flow · commit e6702cb72a98 · 2021-01-31T00:27:40.000+08:00
diff --git a/README.md b/README.md
@@ -14,3 +14,4 @@
 ## 链表
 
 - [21. 合并两个有序链表](https://github.com/Geekhyt/javascript-leetcode/issues/7)
+- [24. 两两交换链表中的节点](https://github.com/Geekhyt/javascript-leetcode/issues/8)

Original file line number	Diff line number	Diff line change
`@@ -14,3 +14,4 @@`
`14`	`14`	`## 链表`
`15`	`15`
`16`	`16`	`- [21. 合并两个有序链表](https://github.com/Geekhyt/javascript-leetcode/issues/7)`
	`17`	`+- [24. 两两交换链表中的节点](https://github.com/Geekhyt/javascript-leetcode/issues/8)`