Update README.md

Author: TommyLemon

README.md

@@ -245,8 +245,7 @@ https://github.com/Tencent/APIJSON/blob/master/Roadmap.md
 如果你解决了某些bug，或者新增了一些功能，欢迎 [贡献代码](https://github.com/Tencent/APIJSON/pulls)，感激不尽~ <br >
 https://github.com/Tencent/APIJSON/blob/master/CONTRIBUTING.md
 
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