docs: fixed cannot find name 'params'

docs/content/1.getting-started/5.routing.md

@@ -131,7 +131,7 @@ If you have a more complex use case, then you can use anonymous route middleware
 ```vue [pages/post/[id].vue]
 <script setup>
 definePageMeta({
-  validate: async (route) => {
+  validate: async ({ params }) => {
     const nuxtApp = useNuxtApp()
     // Check if the id is made up of digits
     return /^\d+$/.test(params.id)