chore: update expired link (#5015)

Author: magisystem0408

CONTRIBUTING.md

@@ -97,11 +97,9 @@ $ aft bootstrap
 
 #### Packages inside Amplify Flutter
 
-- [amplify_flutter](https://github.com/aws-amplify/amplify-flutter/tree/main/packages/amplify_flutter)
-- [amplify_auth_plugin_interface](https://github.com/aws-amplify/amplify-flutter/tree/main/packages/amplify_auth_plugin_interface)
-- [amplify_auth_cognito](https://github.com/aws-amplify/amplify-flutter/tree/main/packages/amplify_auth_cognito)
-- [amplify_analytics_plugin_interface](https://github.com/aws-amplify/amplify-flutter/tree/main/packages/amplify_analytics_plugin_interface)
-- [amplify_analytics_pinpoint](https://github.com/aws-amplify/amplify-flutter/tree/main/packages/amplify_analytics_pinpoint)
+- [amplify_flutter](https://github.com/aws-amplify/amplify-flutter/tree/main/packages/amplify/amplify_flutter)
+- [amplify_auth_cognito](https://github.com/aws-amplify/amplify-flutter/tree/main/packages/auth/amplify_auth_cognito)
+- [amplify_analytics_pinpoint](https://github.com/aws-amplify/amplify-flutter/tree/main/packages/analytics/amplify_analytics_pinpoint)
 
 ### Platform Setup