Bump the dependency-updates group across 1 directory with 2 updates

Bumps the dependency-updates group with 2 updates in the / directory: [docker/build-push-action](https://github.com/docker/build-push-action) and [docker/metadata-action](https://github.com/docker/metadata-action).


Updates `docker/build-push-action` from 6.19.2 to 7.0.0
- [Release notes](https://github.com/docker/build-push-action/releases)
- [Commits](https://github.com/docker/build-push-action/compare/v6.19.2...v7.0.0)

Updates `docker/metadata-action` from 5 to 6
- [Release notes](https://github.com/docker/metadata-action/releases)
- [Commits](https://github.com/docker/metadata-action/compare/v5...v6)

---
updated-dependencies:
- dependency-name: docker/build-push-action
  dependency-version: 7.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: dependency-updates
- dependency-name: docker/metadata-action
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: dependency-updates
...

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

.github/workflows/build-image-on-push.yml

@@ -44,7 +44,7 @@ jobs:
       -
         name: Test build of image
         id: build
-        uses: docker/build-push-action@v6.19.2
+        uses: docker/build-push-action@v7.0.0
         with:
           push: false
           load: true