Merge pull request #1800 from chenxiaozeng/update_doc

update group QR code

Author: wawltor

README.md

@@ -33,9 +33,10 @@ PaddleNLP是飞桨自然语言处理开发库，具备**易用的文本领域API
 微信扫描下方二维码加入官方交流群，与各行各业开发者充分交流，期待您的加入⬇️
 
 <div align="center">
-  <img src="https://user-images.githubusercontent.com/11793384/157790710-cfad5c8a-0edd-49d7-9711-eb1c683a687c.png" width="188" height="188" />
+  <img src="https://raw.githubusercontent.com/PaddlePaddle/PaddleNLP/release/2.2/docs/imgs/wechat.png" width="188" height="188" />
 </div>
 
+
 ## 安装
 
 ### 环境依赖

README_en.md

@@ -47,9 +47,10 @@ To connect with other users and contributors, welcome to join our [Slack channel
 Scan the QR code below with your Wechat⬇️. You can access to official technical exchange group. Look forward to your participation.
 
 <div align="center">
-  <img src="https://user-images.githubusercontent.com/11793384/157790710-cfad5c8a-0edd-49d7-9711-eb1c683a687c.png" width="188" height="188" />
+  <img src="https://raw.githubusercontent.com/PaddlePaddle/PaddleNLP/release/2.2/docs/imgs/wechat.png" width="188" height="188" />
 </div>
 
+
 ## Installation
 
 ### Prerequisites