Update docker/metadata-action action to v5.6.1

Author: renovate[bot]

.github/workflows/main.yml

@@ -65,7 +65,7 @@ jobs:
       # https://github.com/docker/metadata-action
       - name: Extract Docker metadata
         id: meta
-        uses: docker/metadata-action@dbef88086f6cef02e264edb7dbf63250c17cef6c # v5.5.0
+        uses: docker/metadata-action@369eb591f429131d6889c46b94e711f089e6ca96 # v5.6.1
         with:
           images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}