Bump docker/build-push-action from 4.1.1 to 4.2.1

Bumps [docker/build-push-action](https://github.com/docker/build-push-action) from 4.1.1 to 4.2.1.
- [Release notes](https://github.com/docker/build-push-action/releases)
- [Commits](https://github.com/docker/build-push-action/compare/v4.1.1...v4.2.1)

---
updated-dependencies:
- dependency-name: docker/build-push-action
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/reusable-docker-build.yaml

@@ -169,7 +169,7 @@ jobs:
         # https://securitylab.github.com/research/github-actions-preventing-pwn-requests/
       - name: Docker Build and Push
         id: build_image
-        uses: docker/build-push-action@v4.1.1
+        uses: docker/build-push-action@v4.2.1
         with:
           platforms: ${{ inputs.platforms }}
           context: ${{ inputs.context }}