Update docker/metadata-action digest to 318604b

Author: renovate[bot]

.github/workflows/ci.yaml

@@ -173,7 +173,7 @@ jobs:
       - name: Extract Docker metadata
         id: meta
         timeout-minutes: 5
-        uses: docker/metadata-action@8e1d5461f02b7886d3c1a774bfbd873650445aa2
+        uses: docker/metadata-action@318604b99e75e41977312d83839a89be02ca4893
         with:
           images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
           tags: |