fix code style

Author: Jeroeny

Controller/WebUIController.php

@@ -209,9 +209,9 @@ private function getLocale2LanguageMap(): array
         $configuredLocales = $this->getParameter('php_translation.locales');
 
         $names = [];
-        if (class_exists(Locales::class)) {
+        if (\class_exists(Locales::class)) {
             $names = Locales::getNames('en');
-        } elseif (method_exists(Intl::class, 'getLocaleBundle')) {
+        } elseif (\method_exists(Intl::class, 'getLocaleBundle')) {
             $names = Intl::getLocaleBundle()->getLocaleNames('en');
         }