squash: fix ui based on backstage updates

Author: lholmquist

workspaces/bulk-import/packages/app/src/index.tsx

@@ -17,5 +17,6 @@
 import '@backstage/cli/asset-types';
 import ReactDOM from 'react-dom/client';
 import App from './App';
+import '@backstage/ui';
 
 ReactDOM.createRoot(document.getElementById('root')!).render(<App />);