chore: add missing pkg

Author: grabbou

website/package.json

@@ -11,7 +11,8 @@
   "dependencies": {
     "@callstack/rspress-preset": "~0.4.5",
     "@rspress/core": "2.0.0-beta.34",
-    "@rspress/plugin-typedoc": "2.0.0-beta.34"
+    "@rspress/plugin-typedoc": "2.0.0-beta.34",
+    "@rspress/theme-default": "^2.0.0-beta.34"
   },
   "devDependencies": {
     "@types/node": "^24.0.10"