Uses a country label from the static list returned by getStandardList() in group__small_teaser

Problem/Motivation

Uses a country label from the getStandardList() to display group country as result will be displayed a static default country name, even if the related service is overridden it will use an "old" country label

Proposed resolution

Replace:
$countries = CountryManager::getStandardList();
with:
$countries = \Drupal::service('address.country_repository')->getList();

So, the country name will be set/displayed correctly