Update avoid_debug_print suggested fix

[illia-romanenko]

See here more: flutter/flutter#147141
We might want just to provide our own utility to do logging?
Or provide better example that just makes sure that debugPrint is guarded by kDebugMode?

[solid-vovabeloded]

So, basically, we should check that the debugPrint call is wrapped into the !kReleaseMode check, otherwise, we should show the warning.
Also, we should update the lint name to be avoid_debug_print_in_release