build(deps): bump docker/setup-buildx-action in /.github/workflows

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
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/build-test.yml

@@ -62,7 +62,7 @@ jobs:
         cache-image: false
 
     - name: Set up Docker Buildx
-      uses: docker/setup-buildx-action@e468171a9de216ec08956ac3ada2f0791b6bd435 # v3.11.1
+      uses: docker/setup-buildx-action@8d2750c68a42422c14e847fe6c8ac0403b4cbd6f # v3.12.0
 
     - name: Build Docker image ${{ matrix.dockerfile }}
       run: |

.github/workflows/docker.yml

@@ -56,7 +56,7 @@ jobs:
           cache-image: false
 
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@e468171a9de216ec08956ac3ada2f0791b6bd435 # v3.11.1
+        uses: docker/setup-buildx-action@8d2750c68a42422c14e847fe6c8ac0403b4cbd6f # v3.12.0
 
       - name: Log in to GitHub Container Registry
         uses: docker/login-action@5e57cd118135c172c3672efd75eb46360885c0ef # v3.6.0