Bump docker/setup-buildx-action from 3.11.1 to 3.12.0

Bumps [docker/setup-buildx-action](https://github.com/docker/setup-buildx-action) from 3.11.1 to 3.12.0.
- [Release notes](https://github.com/docker/setup-buildx-action/releases)
- [Commits](https://github.com/docker/setup-buildx-action/compare/v3.11.1...v3.12.0)

---
updated-dependencies:
- dependency-name: docker/setup-buildx-action
  dependency-version: 3.12.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

.github/workflows/container-image.yml

@@ -31,7 +31,7 @@ jobs:
         registry: ghcr.io
         username: ${{ github.actor }}
         password: ${{ secrets.GITHUB_TOKEN }}
-    - uses: docker/setup-buildx-action@v3.11.1
+    - uses: docker/setup-buildx-action@v3.12.0
     # > By default, this action uses the Git context so you don't need to use
     # > the actions/checkout action to checkout the repository because this
     # > will be done directly by buildkit. [...]