docs: use consistent page name in example (#19583)

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

@@ -66,7 +66,7 @@ When a `<NuxtLink>` enters the viewport on the client side, Nuxt will automatica
 
 The `useRoute()` composable can be used in a `<script setup>` block or a `setup()` method of a Vue component to access the current route details.
 
-```vue [pages/post/[id].vue]
+```vue [pages/posts/[id].vue]
 <script setup>
 const route = useRoute()
 
@@ -128,7 +128,7 @@ The `validate` property accepts the `route` as an argument. You can return a boo
 
 If you have a more complex use case, then you can use anonymous route middleware instead.
 
-```vue [pages/post/[id].vue]
+```vue [pages/posts/[id].vue]
 <script setup>
 definePageMeta({
   validate: async (route) => {