Bump subosito/flutter-action from 2.18.0 to 2.19.0

Bumps [subosito/flutter-action](https://github.com/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: subosito/flutter-action
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

.github/workflows/main.yml

@@ -32,7 +32,7 @@ jobs:
         with:
           distribution: 'zulu'
           java-version: '17'
-      - uses: subosito/flutter-action@f2c4f6686ca8e8d6e6d0f28410eeef506ed66aff
+      - uses: subosito/flutter-action@e938fdf56512cc96ef2f93601a5a40bde3801046
         with:
           channel: ${{ matrix.flutter_version }}
       - run: ./flutter_ci_script_${{ matrix.flutter_version }}.sh