Update README.md

Rushabhshroff · Rushabhshroff · commit b94e9e92ab07 · 2021-09-23T22:01:54.000+05:30
diff --git a/README.md b/README.md
@@ -9,8 +9,9 @@ A Flutter Plugin to detect System proxy. When using HTTP client that are not pro
 ```yaml
 
 flutter_system_proxy:
-  git:
-    url: https://github.com:Rushabhshroff/flutter_system_proxy.git
+    git: 
+      url: https://github.com/Rushabhshroff/flutter_system_proxy.git
+      ref: main
 
 ```
 
