Bump subosito/flutter-action from 2.10.0 to 2.12.0

Bumps [subosito/flutter-action](https://github.com/subosito/flutter-action) from 2.10.0 to 2.12.0.
- [Release notes](https://github.com/subosito/flutter-action/releases)
- [Commits](subosito/flutter-action@48cafc2...2783a3f)

---
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/test-package.yml

@@ -107,7 +107,7 @@ jobs:
     runs-on: windows-latest
     steps:
       - uses: actions/checkout@8ade135a41bc03ea155e62e844d188df1ea18608
-      - uses: subosito/flutter-action@48cafc24713cca54bbe03cdc3a423187d413aafa
+      - uses: subosito/flutter-action@2783a3f08e1baf891508463f8c6653c258246225
         with:
           channel: "master"
       - name: Install dependencies