Issue #3499679: Fix for LibraryDiscoveryCollector incorrect argument

Issue #3499679: Fix for LibraryDiscoveryCollector incorrect argument Closes #3499679

src/Plugin/Block/LanguageDropdownBlock.php

@@ -119,7 +119,7 @@ class LanguageDropdownBlock extends BlockBase implements ContainerFactoryPluginI
       $container->get('language_manager'),
       $container->get('path.matcher'),
       $container->get('module_handler'),
-      $container->get('library.discovery'),
+      $container->get('library.discovery.collector'),
       $container->get('current_user'),
       $container->get('form_builder')
     );