Bump the github-actions group with 2 updates

Bumps the github-actions group with 2 updates: [actions/cache](https://github.com/actions/cache) and [subosito/flutter-action](https://github.com/subosito/flutter-action).


Updates `actions/cache` from 4.2.2 to 4.2.3
- [Release notes](https://github.com/actions/cache/releases)
- [Changelog](https://github.com/actions/cache/blob/main/RELEASES.md)
- [Commits](actions/cache@d4323d4...5a3ec84)

Updates `subosito/flutter-action` from 2.18.0 to 2.19.0
- [Release notes](https://github.com/subosito/flutter-action/releases)
- [Commits](subosito/flutter-action@f2c4f66...e938fdf)

---
updated-dependencies:
- dependency-name: actions/cache
  dependency-version: 4.2.3
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: github-actions
- dependency-name: subosito/flutter-action
  dependency-version: 2.19.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: github-actions
...

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

Author: dependabot[bot]