[BUG] Icon generated for windows have very low quality (even with icon_size: 256 )

flutter_launcher_icons: ^0.13.1

i have tried to generate my windows application icon with the package and the result is very bad, it have a very low quality in file, but the generated file -> windows/runner/resourses/app_icon.ico have acceptable quality

### :scroll: Pubspec.yaml

dev_dependencies:
flutter_test:
sdk: flutter

flutter_lints: ^2.0.0

flutter_launcher_icons:
windows:
generate: true
image_path: "assets/icons/app_icon.png"
icon_size: 256 # min:48, max:256, default: 48