docs: change deprecated useBody with readBody

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

@@ -141,15 +141,15 @@ export default defineEventHandler(() => `Default api handler`)
 
 ```ts [server/api/submit.post.ts]
 export default defineEventHandler(async (event) => {
-    const body = await useBody(event)
+    const body = await readBody(event)
     return { body }
 })
 ```
 
 You can now universally call this API using `$fetch('/api/submit', { method: 'post', body: { test: 123 } })`.
 
 ::alert{type=warning title=Attention}
-We are using `submit.post.ts` in the filename only to match requests with `POST` method that can accept the request body. When using `useBody` within a GET request, `useBody` will throw a `405 Method Not Allowed` HTTP error.
+We are using `submit.post.ts` in the filename only to match requests with `POST` method that can accept the request body. When using `readBody` within a GET request, `readBody` will throw a `405 Method Not Allowed` HTTP error.
 ::
 
 ### Handling Requests With Query Parameters
@@ -275,7 +275,7 @@ Create a new file in `server/api/test.post.ts`:
 
 ```ts [server/api/test.post.ts]
 export default defineEventHandler(async (event) => {
-  const body = await useBody(event)
+  const body = await readBody(event)
   await useStorage().setItem('redis:test', body)
   return 'Data is set'
 })