chore: 修复官网报错 (#2020)

Co-authored-by: xuying.xu <xuying.xu@alibaba-inc.com>

Author: tangying1027

site/package.json

@@ -28,7 +28,7 @@
     "dumi": "^2.0.0",
     "f2-touchemulator": "~0.0.1",
     "gh-pages": "^2.1.1",
-    "lil-gui": "^0.20.0",
+    "lil-gui": "0.19.1",
     "stats.js": "^0.17.0"
   },
   "devDependencies": {