ci(tools): update docker/setup-buildx-action action to v3.12.0 (#152)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/container.yml

@@ -91,7 +91,7 @@ jobs:
 
       - name: Setup buildx
         id: buildx
-        uses: docker/setup-buildx-action@e468171a9de216ec08956ac3ada2f0791b6bd435 # v3.11.1
+        uses: docker/setup-buildx-action@8d2750c68a42422c14e847fe6c8ac0403b4cbd6f # v3.12.0
 
       - name: Ghcr login
         id: login3