chore(deps): update docker/login-action digest to 7840e6d

Author: renovate[bot]

.github/workflows/docker-publish.yml

@@ -31,7 +31,7 @@ jobs:
       # https://github.com/docker/login-action
       - name: Log into registry ${{ env.REGISTRY }}
         if: github.event_name != 'pull_request'
-        uses: docker/login-action@65b78e6e13532edd9afa3aa52ac7964289d1a9c1
+        uses: docker/login-action@7840e6ddd4a9223910798f6a315544257fccd96e
         with:
           registry: ${{ env.REGISTRY }}
           username: ${{ github.actor }}