Bump docker/metadata-action from 5.5.1 to 5.6.1 (#55)

Author: dependabot[bot]

.github/workflows/publish-docker.yml

@@ -61,7 +61,7 @@ jobs:
       # https://github.com/docker/metadata-action
       - name: Extract Docker metadata
         id: meta
-        uses: docker/metadata-action@8e5442c4ef9f78752691e2d8f8d19755c6f78e81
+        uses: docker/metadata-action@369eb591f429131d6889c46b94e711f089e6ca96
         with:
           images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}