Merge pull request #14 from serenity-js/renovate/docker-login-action-4.x

Update docker/login-action action to v4

Author: jan-molak

.github/workflows/main.yaml

@@ -73,7 +73,7 @@ jobs:
         uses: docker/setup-buildx-action@v3.12.0
 
       - name: Log in to GitHub Container Registry
-        uses: docker/login-action@v3.7.0
+        uses: docker/login-action@v4.2.0
         with:
           registry: ghcr.io
           username: ${{ github.actor }}