docs(readme): update flutter_keyboard_visibility to flutter_keyboard_visibility_temp_fork in plugins section

Author: EchoEllet

README.md

@@ -111,7 +111,7 @@ The `flutter_quill` package uses the following plugins:
 1. [`url_launcher`](https://pub.dev/packages/url_launcher) to open links.
 2. [`quill_native_bridge`](https://pub.dev/packages/quill_native_bridge) to access platform-specific APIs for the
    editor.
-3. [`flutter_keyboard_visibility`](https://pub.dev/packages/flutter_keyboard_visibility) to listen for keyboard
+3. [`flutter_keyboard_visibility_temp_fork`](https://pub.dev/packages/flutter_keyboard_visibility_temp_fork) to listen for keyboard
    visibility
    changes.