Added Leetcode-cn to Chrome Extension

[s192516]

The English version:
Thank you very much for the author's plug-in. Could you add the url of the Chinese interface in Chrom Extension to facilitate the use of users in China
https://leetcode-cn.com/*
The original:
非常感谢作者的插件, 可否在chrom Extension中增加中国区界面的网址 , 方便中国区用户使用

[SysSn13]

leetcode-cn.com organizes many contests which are not on leetcode.com. As of now, we have covered leetcode.com's contests only. Also, the front-end of leetcode-cn.com is different than leetcode.com, so for enabling browser-extension on leetcode-cn.com, we have to write additional code for the extension.

[s192516]

leetcode-cn.com organizes many contests which are not on leetcode.com. As of now, we have covered leetcode.com's contests only. Also, the front-end of leetcode-cn.com is different than leetcode.com, so for enabling browser-extension on leetcode-cn.com, we have to write additional code for the extension.

ok, thans for reply