Bump docker/build-push-action from 5 to 6 (#3)

Bumps [docker/build-push-action](https://github.com/docker/build-push-action) from 5 to 6.
- [Release notes](https://github.com/docker/build-push-action/releases)
- [Commits](docker/build-push-action@v5...v6)

---
updated-dependencies:
- dependency-name: docker/build-push-action
  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/build-container.yaml

@@ -54,7 +54,7 @@ jobs:
 
             - name: Build the images
               id: container
-              uses: docker/build-push-action@v5
+              uses: docker/build-push-action@v6
               with:
                 platforms: ${{ (github.event_name == 'pull_request' && 'linux/amd64') || 'linux/amd64, linux/arm64' }}
                 tags: ${{ steps.meta.outputs.tags }}