Bump docker/setup-buildx-action from 3.11.1 to 3.12.0 (#264)

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](docker/setup-buildx-action@e468171...8d2750c)

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

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

Author: dependabot[bot]

.github/workflows/build-containers.yml

@@ -27,7 +27,7 @@ jobs:
       - name: Setup QEMU
         uses: docker/setup-qemu-action@c7c53464625b32c7a7e944ae62b3e17d2b600130 # v3.7.0
       - name: Setup Docker buildx
-        uses: docker/setup-buildx-action@e468171a9de216ec08956ac3ada2f0791b6bd435 # v3.11.1
+        uses: docker/setup-buildx-action@8d2750c68a42422c14e847fe6c8ac0403b4cbd6f # v3.12.0
       - name: docker login
         uses: docker/login-action@5e57cd118135c172c3672efd75eb46360885c0ef # v3.6.0
         with: