Fix network.firewall.log-level YAML indentation in smoke-copilot workflows (#6382)

Author: Copilot

.github/workflows/smoke-copilot-playwright.lock.yml

@@ -29,6 +29,7 @@ network:
     - www.google.com             # Chrome services
     - accounts.google.com        # Chrome account checks
     - android.clients.google.com # Chrome internal
+  firewall:
     log-level: debug  # Enable debug-level firewall logs
 sandbox:
   agent: false  # Firewall disabled (migrated from network.firewall)