Update README.md

Geekhyt · web-flow · commit c90ccf7ab58d · 2021-01-22T21:47:34.000+08:00
diff --git a/README.md b/README.md
@@ -7,3 +7,4 @@
 - [1.两数之和](https://github.com/Geekhyt/javascript-leetcode/issues/1)
 - [11.盛水最多的容器](https://github.com/Geekhyt/javascript-leetcode/issues/2)
 - [15.三数之和](https://github.com/Geekhyt/javascript-leetcode/issues/3)
+- [26. 删除排序数组中的重复项](https://github.com/Geekhyt/javascript-leetcode/issues/4)
