Update README.md

Author: khs1994

README.md

@@ -7,7 +7,7 @@
 ## 微信小程序
 
 <p align="center">
-<img width="200" src="https://user-images.githubusercontent.com/16733187/49682252-3ac4c500-faec-11e8-86ab-eafe0139be6b.jpg">
+<img width="200" src="https://yewm28.coding-pages.com/49682252-3ac4c500-faec-11e8-86ab-eafe0139be6b.jpg">
 </p>
 
 <p align="center"><strong>微信扫码 随时随地阅读~</strong></p>
@@ -34,13 +34,13 @@
 ## 社区
 
 <p align="center">
-<img width="200" src="https://user-images.githubusercontent.com/16733187/46847944-84a96b80-ce19-11e8-9f0c-ec84b2ac463e.jpg">
+<img width="200" src="https://yewm28.coding-pages.com/46847944-84a96b80-ce19-11e8-9f0c-ec84b2ac463e.jpg">
 </p>
 
 <p align="center"><strong>项目维护者微信公众号</strong></p>
 
 <p align="center">
-<img width="200" src="https://user-images.githubusercontent.com/16733187/65308302-55b87f80-dbbc-11e9-9d42-57eac554fb3b.jpg">
+<img width="200" src="https://yewm28.coding-pages.com/wechat.jpg">
 </p>
 
 <p align="center"><strong>微信扫码 加入群聊~</strong></p>