docs: Fix typo

docs/pages/docs/getting-started/app-router/without-i18n-routing.mdx

@@ -29,7 +29,7 @@ Now, we're going to create the following file structure:
 ├── next.config.mjs (2)
 └── src
     ├── i18n
-    │   └── request.tsx (3)
+    │   └── request.ts (3)
     └── app
         ├── layout.tsx (4)
         └── page.tsx (5)