Bump docker/setup-buildx-action from 3.11.1 to 3.12.0 (#2256)

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

.github/workflows/publish-image.yml

@@ -42,7 +42,7 @@ jobs:
         uses: actions/checkout@v6
 
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v3.11.1
+        uses: docker/setup-buildx-action@v3.12.0
 
       - name: Log in to GHCR
         uses: docker/login-action@v3.6.0
@@ -115,7 +115,7 @@ jobs:
       IMAGE_NAME: ${{ github.repository }}
     steps:
       - name: Set up Docker Buildx (for imagetools)
-        uses: docker/setup-buildx-action@v3.11.1
+        uses: docker/setup-buildx-action@v3.12.0
 
       - name: Log in to GHCR
         uses: docker/login-action@v3.6.0