build(deps): bump subosito/flutter-action from 2.5.0 to 2.6.1

Bumps [subosito/flutter-action](https://github.com/subosito/flutter-action) from 2.5.0 to 2.6.1.
- [Release notes](https://github.com/subosito/flutter-action/releases)
- [Commits](https://github.com/subosito/flutter-action/compare/v2.5.0...v2.6.1)

---
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>

@@ -16,7 +16,7 @@ jobs:
         with:
           java-version: 11
           distribution: temurin
-      - uses: subosito/flutter-action@v2.5.0
+      - uses: subosito/flutter-action@v2.6.1
         with:
           cache: true
       - name: Version
@@ -33,7 +33,7 @@ jobs:
         with:
           java-version: 11
           distribution: temurin
-      - uses: subosito/flutter-action@v2.5.0
+      - uses: subosito/flutter-action@v2.6.1
         with:
           cache: true
       - name: Format