Update devcontainer-smoketest.yaml

Adjust to add docker login.

Author: networkfusion

.github/workflows/devcontainer-smoketest.yaml

@@ -40,6 +40,13 @@ jobs:
         with:
           submodules: true
 
+      - name: Log into GHCR
+        uses: docker/login-action@v2
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
       - name: Free Disk Space (Ubuntu)
         uses: jlumbroso/free-disk-space@main
         with: