Upgrade lib in demo

Author: bendera

packages/demo/package-lock.json

@@ -10,7 +10,7 @@
     "preview": "vite preview"
   },
   "dependencies": {
-    "@vscode-elements/react-elements": "^0.1.0",
+    "@vscode-elements/react-elements": "^0.4.0",
     "@vscode-elements/webview-playground": "^1.1.3",
     "react": "^18.3.1",
     "react-dom": "^18.3.1"