Update README.md， add communication groups QR code (#86)

Author: afumu

README.md

@@ -222,3 +222,9 @@ http://localhost:8080?q=A.username=zhangsan&q=B.username=lisi&gcond=A|B
   </picture>
 </a>
 
+## 技术交流群
+如果二维码过时了，可以加微信：afumubit，注意备注：gplus
+![gplus](https://github.com/acmestack/gorm-plus/assets/50908453/e96b4f1f-753d-4cae-819c-efad3f780617)
+
+
+