build(deps): bump docker/build-push-action from 6.11.0 to 6.12.0 (#52)

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@b32b51a...67a2d40)

---
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>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/build-n-publish.yml

@@ -81,7 +81,7 @@ jobs:
       - name: Build and push
         if: steps.docker-credentials.outputs.defined == 'true'
         id: docker-build
-        uses: docker/build-push-action@b32b51a8eda65d6793cd0494a773d4f6bcef32dc # v6.11.0
+        uses: docker/build-push-action@67a2d409c0a876cbe6b11854e3e25193efe4e62d # v6.12.0
         with:
           context: .
           build-args: ALPINE_RELEASE=${{ steps.release.outputs.rel }}