Update docker/login-action digest to 6d4b68b

Author: renovate[bot]

.github/workflows/docker-publish.yml

@@ -34,7 +34,7 @@ jobs:
       # https://github.com/docker/login-action
       - name: Log into registry ${{ env.REGISTRY }}
         if: github.event_name != 'pull_request'
-        uses: docker/login-action@9780b0c442fbb1117ed29e0efdff1e18412f7567
+        uses: docker/login-action@6d4b68b490aef8836e8fb5e50ee7b3bdfa5894f0
         with:
           registry: ${{ env.REGISTRY }}
           username: ${{ github.actor }}