Update docker/build-push-action action to v4.2.1

Author: renovate[bot]

.github/workflows/ci.yml

@@ -54,7 +54,7 @@ jobs:
           password: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Push to GitHub Packages
-        uses: docker/build-push-action@3b5e8027fcad23fda98b2e3ac259d8d67585f671 # v4.0.0
+        uses: docker/build-push-action@0a97817b6ade9f46837855d676c4cca3a2471fc9 # v4.2.1
         with:
           push: ${{ github.event_name != 'pull_request' }}
           tags: ${{ steps.docker_meta.outputs.tags }}