chore(deps): update docker/metadata-action digest to 818d4b7

Author: renovate[bot]

.github/workflows/docker-build-push.yml

@@ -60,7 +60,7 @@ jobs:
 
       - name: Set Docker image metadata
         id: docker_meta
-        uses: docker/metadata-action@69f6fc9d46f2f8bf0d5491e4aabe0bb8c6a4678a # tag=v4
+        uses: docker/metadata-action@818d4b7b91585d195f67373fd9cb0332e31a7175 # v4
         with:
           images: domjtalbot/domain-resolver,ghcr.io/domjtalbot/domain-resolver
           flavor: |