fix: fix bundle.json 404

Author: kagol

template/lowcode-designer/engine.config.js

@@ -1,7 +1,7 @@
 export default {
   id: 'engine.config',
   theme: 'light',
-  material: ['/mock/bundle.json'],
+  material: ['./mock/bundle.json'],
   scripts: [],
   styles: []
 }