chore(deps): update github-actions (#19654)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

.github/workflows/build-mobile.yml

@@ -96,7 +96,7 @@ jobs:
           key: build-mobile-gradle-${{ runner.os }}-main
 
       - name: Setup Flutter SDK
-        uses: subosito/flutter-action@395322a6cded4e9ed503aebd4cc1965625f8e59a # v2.20.0
+        uses: subosito/flutter-action@fd55f4c5af5b953cc57a2be44cb082c8f6635e8e # v2.21.0
         with:
           channel: 'stable'
           flutter-version-file: ./mobile/pubspec.yaml

.github/workflows/pr-label-validation.yml

@@ -14,7 +14,7 @@ jobs:
       pull-requests: write
     steps:
       - name: Require PR to have a changelog label
-        uses: mheap/github-action-required-labels@fb29a14a076b0f74099f6198f77750e8fc236016 # v5.5.0
+        uses: mheap/github-action-required-labels@8afbe8ae6ab7647d0c9f0cfa7c2f939650d22509 # v5.5.1
         with:
           mode: exactly
           count: 1

.github/workflows/static_analysis.yml

@@ -49,7 +49,7 @@ jobs:
           persist-credentials: false
 
       - name: Setup Flutter SDK
-        uses: subosito/flutter-action@395322a6cded4e9ed503aebd4cc1965625f8e59a # v2.20.0
+        uses: subosito/flutter-action@fd55f4c5af5b953cc57a2be44cb082c8f6635e8e # v2.21.0
         with:
           channel: 'stable'
           flutter-version-file: ./mobile/pubspec.yaml

.github/workflows/test.yml

@@ -516,7 +516,7 @@ jobs:
           persist-credentials: false
 
       - name: Setup Flutter SDK
-        uses: subosito/flutter-action@395322a6cded4e9ed503aebd4cc1965625f8e59a # v2.20.0
+        uses: subosito/flutter-action@fd55f4c5af5b953cc57a2be44cb082c8f6635e8e # v2.21.0
         with:
           channel: 'stable'
           flutter-version-file: ./mobile/pubspec.yaml