Merge pull request #71 from codefuse-ai/chencyudel-patch-4

Update README_cn.md

Author: chencyudel

README_cn.md

@@ -192,4 +192,4 @@ sh init_env.sh
 **社招**：https://talent.antgroup.com/off-campus-position?positionId=1933830
 
 ## 联系我们
-![img_wx.jpg](./assets/CodeFuse-AI群.jpg)
+![img_wx.png](./assets/CodeFuse-AI群.png)