Bump docker/build-push-action from 5 to 6 (#464)

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/devcontainer.yml

@@ -59,7 +59,7 @@ jobs:
           password: ${{ secrets.GITHUB_TOKEN }}
       - name: Build image${{ fromJson(steps.image.outputs.push) && ' and push it by digest' || ''}}
         id: build
-        uses: docker/build-push-action@v5
+        uses: docker/build-push-action@v6
         with:
           file: .devcontainer/Dockerfile
           labels: ${{ steps.meta.outputs.labels }}