Bump docker/build-push-action from 5 to 6 (#22)

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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Author: dependabot[bot]

.github/workflows/docker.yml

@@ -46,7 +46,7 @@ jobs:
             ${{ runner.os }}-docker
       - name: Build and push
         id: docker_build
-        uses: docker/build-push-action@v5
+        uses: docker/build-push-action@v6
         with:
           platforms: ${{ env.platforms }}
           push: ${{ github.event_name != 'pull_request' }}