Update README-cn.md

Author: aidlearning

README-cn.md

@@ -83,7 +83,7 @@ AI编程平台由深度学习框架和Python可视化编程框架（Python IDE
 - [更多参考](intr.md)
 <img src="images/QQqun.png" height="256"/>
 
-- [推特](https://twitter.com/aidlearning)
+- [推特-twitter](https://twitter.com/aidlearning)
 
 - [更多示例](http://code.aidlearning.net:3000/explore/repos)