Bump codecov/codecov-action from 5 to 6 #6602

Job	Run time
flutter_format	1m 33s
flutter_analyze	1m 58s
flutter_widget_test (ubuntu)	3m 0s
flutter_integration_test (ubuntu)	2m 58s
flutter_widget_test (windows)	6m 22s
flutter_integration_test (macos-latest)	6m 18s
flutter_integration_test (windows)	7m 35s
flutter_widget_test (macos-latest)	6m 9s
flutter_format	1m 33s
flutter_integration_test (windows)	7m 30s
flutter_integration_test (ubuntu)	2m 58s
flutter_widget_test (windows)	6m 22s
flutter_widget_test (ubuntu)	3m 0s
flutter_widget_test (macos-latest)	6m 9s
flutter_integration_test (macos-latest)	6m 18s
flutter_analyze	1m 58s
	1h 11m 41s

Provide feedback