chore(deps): bump subosito/flutter-action from 2.11.0 to 2.12.0

Bumps [subosito/flutter-action](https://github.com/subosito/flutter-action) from 2.11.0 to 2.12.0.
- [Release notes](https://github.com/subosito/flutter-action/releases)
- [Commits](subosito/flutter-action@v2.11.0...v2.12.0)

---
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>

.github/workflows/mobile.yml

@@ -19,7 +19,7 @@ jobs:
         distribution: 'temurin'
         java-version: '17'
         cache: 'gradle'
-    - uses: subosito/flutter-action@v2.11.0
+    - uses: subosito/flutter-action@v2.12.0
       with:
         channel: 'beta'
         flutter-version: '2.2.0-10.1.pre'