chore(deps): update docker/metadata-action digest to a60f0f6 (#29)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/publish.yml

@@ -47,7 +47,7 @@ jobs:
       # https://github.com/docker/metadata-action
       - name: Extract Docker metadata
         id: meta
-        uses: docker/metadata-action@418e4b98bf2841bd337d0b24fe63cb36dc8afa55
+        uses: docker/metadata-action@a60f0f62b5c12316066c8db464bfb2faafd7907b
         with:
           images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
           flavor: |