Renovate: Update docker/login-action action to v4

Author: renovate[bot]

.github/workflows/container-registry-ghcr.yaml

@@ -23,7 +23,7 @@ jobs:
       - name: Check out code
         uses: actions/checkout@v6
       - name: Log in to the Container registry
-        uses: docker/login-action@v3
+        uses: docker/login-action@v4
         with:
           password: ${{ secrets.GITHUB_TOKEN }}
           registry: ghcr.io