command fix

Author: kameshsampath

.github/workflows/staging.yml

@@ -59,6 +59,6 @@ jobs:
        run: |
          npm -g install gh-pages@2.2.0
          gh-pages -d gh-pages -x \
-         --repo "git@github.com/redhat-developer-docs/knative-tutorial-staging"
-         --dotfiles
+         --repo "git@github.com/redhat-developer-docs/knative-tutorial-staging" \
+         --dotfiles \
          -m "Staging Publish"