Bump docker/build-push-action from 5 to 6 (#362)

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
...

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

.github/workflows/publish.yml

@@ -46,7 +46,7 @@ jobs:
 
  - name: Build and push ${{github.event.release.tag_name }}
  id: docker_build_release
- uses: docker/build-push-action@v5
+ uses: docker/build-push-action@v6
  if: ${{ github.event.release.tag_name != '' }}
  with:
  context: .
@@ -65,7 +65,7 @@ jobs:
 
  - name: Build and push main
  id: docker_build_main
- uses: docker/build-push-action@v5
+ uses: docker/build-push-action@v6
  if: ${{ github.event.release.tag_name == '' && env.NEW_COMMIT_COUNT > 0 }}
  with:
  context: .