chore(deps): bump subosito/flutter-action from 1.5.3 to 2.8.0

Bumps [subosito/flutter-action](https://github.com/subosito/flutter-action) from 1.5.3 to 2.8.0.
- [Release notes](https://github.com/subosito/flutter-action/releases)
- [Commits](subosito/flutter-action@v1.5.3...v2.8.0)

---
updated-dependencies:
- dependency-name: subosito/flutter-action
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

.github/workflows/pub_updater.yaml

@@ -19,7 +19,7 @@ jobs:
     steps:
       - uses: actions/checkout@v2.3.4
 
-      - uses: subosito/flutter-action@v1.5.3
+      - uses: subosito/flutter-action@v2.8.0
 
       - name: Install Dependencies
         run: |