Bump docker/setup-buildx-action in the actions-minor-patch group

Bumps the actions-minor-patch group with 1 update: [docker/setup-buildx-action](https://github.com/docker/setup-buildx-action).


Updates `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@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
  dependency-group: actions-minor-patch
...

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

Author: dependabot[bot]

.github/workflows/main.yml

@@ -60,7 +60,7 @@ jobs:
             org.opencontainers.image.title=Staging Wikibase image
 
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v3.11.1
+        uses: docker/setup-buildx-action@v3.12.0
 
       - name: Build and push staging image
         uses: docker/build-push-action@v6.18.0
@@ -117,7 +117,7 @@ jobs:
             org.opencontainers.image.title=Redis Jobrunner (staging)
 
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v3.11.1
+        uses: docker/setup-buildx-action@v3.12.0
 
       - name: Build and push Docker jobrunner image
         uses: docker/build-push-action@v6.18.0
@@ -179,7 +179,7 @@ jobs:
             org.opencontainers.image.title=MaRDI Portal Mediawiki/Wikibase image for Kubernetes
 
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v3.11.1
+        uses: docker/setup-buildx-action@v3.12.0
 
       - name: Build and push production image
         uses: docker/build-push-action@v6.18.0
@@ -245,7 +245,7 @@ jobs:
             org.opencontainers.image.title=Redis Jobrunner (production)
       
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v3.11.1
+        uses: docker/setup-buildx-action@v3.12.0
 
       - name: Build and push jobrunner production image
         uses: docker/build-push-action@v6.18.0
@@ -296,7 +296,7 @@ jobs:
             org.opencontainers.image.title=Apache Proxy
 
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v3.11.1
+        uses: docker/setup-buildx-action@v3.12.0
 
       - name: Build and push Apache image
         uses: docker/build-push-action@v6.18.0
@@ -340,7 +340,7 @@ jobs:
             org.opencontainers.image.description=Wikibase development environment with additional tools
 
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v3.11.1
+        uses: docker/setup-buildx-action@v3.12.0
 
       - name: Build and push Docker dev image
         uses: docker/build-push-action@v6.18.0