Bump docker/build-push-action from 6.18.0 to 7.0.0 (#227)

* Bump docker/build-push-action from 6.18.0 to 7.0.0

Bumps [docker/build-push-action](https://github.com/docker/build-push-action) from 6.18.0 to 7.0.0.
- [Release notes](https://github.com/docker/build-push-action/releases)
- [Commits](https://github.com/docker/build-push-action/compare/v6.18.0...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
...

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

* Apply suggestions from code review

Co-authored-by: Joel Challis <git@zvecr.com>

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Joel Challis <git@zvecr.com>

.github/workflows/docker-pr.yml

@@ -36,7 +36,7 @@ jobs:
         python3 -m build
 
     - name: Build Container
-      uses: docker/build-push-action@v6.18.0
+      uses: docker/build-push-action@v7
       with:
         context: .
         platforms: linux/amd64,linux/arm64