chore(deps): update docker/login-action digest to f4ef78c

Author: renovate[bot]

.github/workflows/relay.yaml

@@ -45,7 +45,7 @@ jobs:
 
       - name: Log into registry ${{ env.REGISTRY }}
         if: github.event_name != 'pull_request'
-        uses: docker/login-action@70e1ff84cbd75a9e03941a79f21f05f1b03a71bb
+        uses: docker/login-action@f4ef78c080cd8ba55a85445d5b36e214a81df20a
         with:
           registry: ${{ env.REGISTRY }}
           username: ${{ github.actor }}