Bump docker/build-push-action from 6.11.0 to 6.12.0

Bumps [docker/build-push-action](https://github.com/docker/build-push-action) from 6.11.0 to 6.12.0.
- [Release notes](https://github.com/docker/build-push-action/releases)
- [Commits](docker/build-push-action@v6.11.0...v6.12.0)

---
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/ghcr.yml

@@ -76,7 +76,7 @@ jobs:
           password: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Build and push Docker image
-        uses: docker/build-push-action@v6.11.0
+        uses: docker/build-push-action@v6.12.0
         id: build
         with:
           context: .