docs: Update comment for getDefaultLocale method to clarify locale handling

apps/mobile/packages/core_localization/lib/src/data/repositories_impl/locale_repository_impl.dart

@@ -32,6 +32,8 @@ class LocaleRepositoryImpl implements LocaleRepositoryInterface {
     return getDefaultLocale();
   }
 
+  /// We can hardcode this to english based on customer requirements, 
+  /// but in a more dynamic app this should be the device locale or a fallback to english.
   @override
   Locale getDefaultLocale() {
     return const Locale('en');