Corrected code example (#3089)

Author: abelta

apps/website-new/docs/en/guide/start/quick-start.mdx

@@ -102,11 +102,11 @@ import { pluginReact } from '@rsbuild/plugin-react';
 import { pluginModuleFederation } from '@module-federation/rsbuild-plugin';
 
 export default defineConfig({
-  plugins: [pluginReact()],
   server: {
     port: 3000,
   },
   plugins: [
+    pluginReact(),
     pluginModuleFederation({
       name: 'federation_provider',
       exposes: {