chore: bump subosito/flutter-action from 2.15.0 to 2.16.0 (#234)

Bumps [subosito/flutter-action](https://github.com/subosito/flutter-action) from 2.15.0 to 2.16.0.
- [Release notes](https://github.com/subosito/flutter-action/releases)
- [Commits](subosito/flutter-action@v2.15.0...v2.16.0)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/run-tests.yml

@@ -32,7 +32,7 @@ jobs:
         with:
           distribution: "zulu"
           java-version: "11"
-      - uses: subosito/flutter-action@v2.15.0
+      - uses: subosito/flutter-action@v2.16.0
         with:
           flutter-version: "2.0.6"
       - run: flutter create regression_test_app