build: (deps): Bump handy_window from 0.4.0 to 0.4.2

Bumps [handy_window](https://github.com/ubuntu-flutter-community/handy_window) from 0.4.0 to 0.4.2.
- [Release notes](https://github.com/ubuntu-flutter-community/handy_window/releases)
- [Changelog](https://github.com/ubuntu/handy_window.dart/blob/main/CHANGELOG.md)
- [Commits](https://github.com/ubuntu-flutter-community/handy_window/compare/v0.4.0...v0.4.2)

---
updated-dependencies:
- dependency-name: handy_window
  dependency-version: 0.4.2
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

pubspec.yaml

@@ -43,7 +43,7 @@ dependencies:
   flutter_webrtc: ^1.3.0
   geolocator: ^14.0.2
   go_router: ^17.1.0
-  handy_window: ^0.4.0
+  handy_window: ^0.4.2
   highlight: ^0.7.0
   html: ^0.15.4
   http: ^1.6.0