Update README-cn.md

Author: aidlearning

README-cn.md

@@ -103,7 +103,7 @@ AI编程平台由深度学习框架和Python可视化编程框架（Python IDE
 - [更多示例](http://code.aidlearning.net)
 
 
-<img src="http://www.aidlearning.net/git_img/aid-examples.png"/>
+<img src="https://www.aidlearning.net/git_img/aid-examples.png"/>
 
 
 ## License