Bump subosito/flutter-action from 2.17.0 to 2.18.0

Bumps [subosito/flutter-action](https://github.com/subosito/flutter-action) from 2.17.0 to 2.18.0.
- [Release notes](https://github.com/subosito/flutter-action/releases)
- [Commits](subosito/flutter-action@74af56c...f2c4f66)

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

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/flutter-ci.yml

@@ -31,7 +31,7 @@ jobs:
         with:
           distribution: 'zulu' # See https://github.com/actions/setup-java#supported-distributions
           java-version: "17"
-      - uses: subosito/flutter-action@74af56c5ed2697ba4621264652728e8d217e53d3
+      - uses: subosito/flutter-action@f2c4f6686ca8e8d6e6d0f28410eeef506ed66aff
         with:
           channel: ${{ matrix.flutter_version }}
       - run: dart --version