Update actions/dependency-review-action action to v4.8.1

Author: renovate[bot]

.github/workflows/flutter.yml

@@ -24,7 +24,7 @@ jobs:
         with:
           fetch-depth: 0 # for SonarCloud
 
-      - uses: actions/dependency-review-action@595b5aeba73380359d98a5e087f648dbb0edce1b # v4.7.3
+      - uses: actions/dependency-review-action@40c09b7dc99638e5ddb0bfd91c1673effc064d8a # v4.8.1
         if: github.base_ref
 
       - name: Setup Flutter