docs: commentary correction for i18n app folder (#47226)

Simple correction of a word in the comments

examples/app-dir-i18n-routing/get-dictionary.ts

@@ -2,7 +2,7 @@ import 'server-only'
 import type { Locale } from './i18n-config'
 
 // We enumerate all dictionaries here for better linting and typescript support
-// We also get the defalt import for cleaner types
+// We also get the default import for cleaner types
 const dictionaries = {
   en: () => import('./dictionaries/en.json').then((module) => module.default),
   de: () => import('./dictionaries/de.json').then((module) => module.default),