chore(deps): update docker/metadata-action digest to 9dc751f

Author: renovate[bot]

.github/workflows/build-image.yml

@@ -18,7 +18,7 @@ jobs:
 
       - name: Extract metadata (tags, labels) for Docker
         id: meta
-        uses: docker/metadata-action@6d6eaf34518db036006be0b031c21fd4eb72ef69
+        uses: docker/metadata-action@9dc751fe249ad99385a2583ee0d084c400eee04e
         with:
           images: ghcr.io/elsbrock/guix-base
           tags: |