Bump docker/build-push-action from 6.19.2 to 7.0.0 (#116)

Bumps [docker/build-push-action](https://github.com/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)

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

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

.github/workflows/container-image.yml

@@ -19,7 +19,7 @@ jobs:
     # > will be done directly by buildkit. [...]
     # > any file mutation in the steps that precede [...] will be ignored
     # https://github.com/marketplace/actions/build-and-push-docker-images
-    - uses: docker/build-push-action@v6.19.2
+    - uses: docker/build-push-action@v7.0.0
       with:
         platforms: |
           linux/amd64