chore(deps): update docker/metadata-action digest to 766400c

Author: renovate[bot]

.github/workflows/ci.yml

@@ -81,7 +81,7 @@ jobs:
           password: ${{ secrets.GITHUB_TOKEN }}
       - name: Docker meta
         id: meta
-        uses: docker/metadata-action@57396166ad8aefe6098280995947635806a0e6ea
+        uses: docker/metadata-action@766400ca14a75010e7b2e3119aa0d5b46826e8c7
         with:
           images: ghcr.io/${{ github.repository }}
           flavor: |