docs: fixed a config error in quick-start.mdx (#3091)

Co-authored-by: ScriptedAlchemy <[email protected]>

Author: Alexandrsv

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

@@ -102,9 +102,6 @@ import { pluginReact } from '@rsbuild/plugin-react';
 import { pluginModuleFederation } from '@module-federation/rsbuild-plugin';
 
 export default defineConfig({
-  server: {
-    port: 3000,
-  },
   plugins: [
     pluginReact(),
     pluginModuleFederation({
@@ -115,6 +112,9 @@ export default defineConfig({
       shared: ['react', 'react-dom'],
     }),
   ],
+  server: {
+    port: 3000,
+  },
 });
 ```