fix(headlines-feed): update countries filter sort order

- Change the sort order from descending to ascending for country names
- This ensures that the list of countries is displayed in alphabetical order

Author: fulleni

lib/headlines-feed/bloc/countries_filter_bloc.dart

@@ -53,7 +53,7 @@ class CountriesFilterBloc
     try {
       final response = await _countriesRepository.readAll(
         pagination: const PaginationOptions(limit: _countriesLimit),
-        sort: [const SortOption('name', SortOrder.desc)],
+        sort: [const SortOption('name', SortOrder.asc)],
       );
       emit(
         state.copyWith(