Bump docker/setup-buildx-action from 3.11.1 to 3.12.0 (#123)

Author: dependabot[bot]

.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. [...]