Update docker/metadata-action digest to d31acd5

Author: renovate[bot]

.github/workflows/docker-publish.yml

@@ -64,7 +64,7 @@ jobs:
       # https://github.com/docker/metadata-action
       - name: Extract Docker metadata
         id: meta
-        uses: docker/metadata-action@dbef88086f6cef02e264edb7dbf63250c17cef6c
+        uses: docker/metadata-action@d31acd50653ded455ab8972a1eb9a656b0aef94a
         with:
           images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}