chore(deps): update docker/metadata-action digest to 4378dc6

Author: renovate[bot]

.github/workflows/docker.yml

@@ -20,7 +20,7 @@ jobs:
 
       - name: Extract metadata (tags, labels) for Docker
         id: meta
-        uses: docker/metadata-action@c299e40c65443455700f0fdfc63efafe5b349051
+        uses: docker/metadata-action@4378dc6be7f72231dfe78ac7e0364a44f1c9f54b
         with:
           images: clivern/lynx