update codecov badge

Author: git-elliot

README.md

@@ -1,6 +1,6 @@
 # Network Tools Flutter
 
-[![pub package](https://img.shields.io/pub/v/network_tools_flutter.svg)](https://pub.dev/packages/network_tools_flutter) [![Dart](https://github.com/osociety/network_tools_flutter/actions/workflows/flutter.yml/badge.svg)](https://github.com/osociety/network_tools_flutter/actions/workflows/flutter.yml) [![codecov](https://codecov.io/gh/git-elliot/network_tools_flutter/branch/main/graph/badge.svg?token=J9G2472GQZ)](https://codecov.io/gh/git-elliot/network_tools_flutter)
+[![pub package](https://img.shields.io/pub/v/network_tools_flutter.svg)](https://pub.dev/packages/network_tools_flutter) [![Dart](https://github.com/osociety/network_tools_flutter/actions/workflows/flutter.yml/badge.svg)](https://github.com/osociety/network_tools_flutter/actions/workflows/flutter.yml) [![codecov](https://codecov.io/gh/osociety/network_tools_flutter/graph/badge.svg?token=X8UVO7RUA4)](https://codecov.io/gh/osociety/network_tools_flutter)
 
 ## Features