Bump subosito/flutter-action from 1 to 2

Bumps [subosito/flutter-action](https://github.com/subosito/flutter-action) from 1 to 2.
- [Release notes](https://github.com/subosito/flutter-action/releases)
- [Commits](subosito/flutter-action@v1...v2)

---
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/ci.yml

@@ -16,7 +16,7 @@ jobs:
       - uses: actions/checkout@v1
 
       - name: Install Flutter
-        uses: subosito/flutter-action@v1
+        uses: subosito/flutter-action@v2
         with:
           channel: 'stable'
           flutter-version: '3.16.x'

.github/workflows/linter.yml

@@ -17,7 +17,7 @@ jobs:
         uses: actions/checkout@v2
 
       - name: Setup Flutter
-        uses: subosito/flutter-action@v1
+        uses: subosito/flutter-action@v2
         with:
           channel: 'stable'
           flutter-version: '3.16.x'