update router/index.js

src/router/index.js

@@ -199,8 +199,8 @@ export const asyncRoutes = [
   BackgroundPostRouter,
   BackgroundSiteRouter,
   BackgroundAdminRouter,
-  BackgroundBackendRouter,
   BackgroundOssRouter,
+  BackgroundBackendRouter,
   BackgroundBlogRouter,
   {
     path: '*',