docs: fix types in "Server Utilities" example

docs/2.guide/2.directory-structure/1.server.md

@@ -111,18 +111,20 @@ For example, you can define a custom handler utility that wraps the original han
 **Example:**
 
 ```ts [server/utils/handler.ts]
-import type { EventHandler } from 'h3'
+import type { EventHandler, EventHandlerRequest } from 'h3'
 
-export const defineWrappedResponseHandler = (handler: EventHandler) =>
-  defineEventHandler(async (event) => {
+export const defineWrappedResponseHandler = <T extends EventHandlerRequest, D>(
+  handler: EventHandler<T, D>
+): EventHandler<T, D> =>
+  defineEventHandler<T>(async event => {
     try {
       // do something before the route handler
       const response = await handler(event)
       // do something after the route handler
-      return { response }
+      return response
     } catch (err) {
       // Error handling
-      return { err }
+      return err
     }
   })
 ```