fix(rf2): minor change to ensure that serialization of merged...

...language configuration does not cause issues when updating codesystem
metadata after RF2 import

Author: cmark

snomed/com.b2international.snowowl.snomed.datastore/src/com/b2international/snowowl/snomed/datastore/request/rf2/SnomedRf2ImportRequest.java

@@ -513,7 +513,7 @@ private void updateCodeSystemSettings(final BranchContext context, final Resourc
 		ResourceRequests.prepareUpdate(resourceUri.getResourceId())
 				.setSettings(Map.of(
 					CodeSystem.CommonSettings.LOCALES, currentLocales,
-					SnomedTerminologyComponentConstants.CODESYSTEM_LANGUAGE_CONFIG_KEY, mergedLanguagesConfiguration.values()
+					SnomedTerminologyComponentConstants.CODESYSTEM_LANGUAGE_CONFIG_KEY, List.copyOf(mergedLanguagesConfiguration.values())
 				))
 				.build(author, String.format("Update '%s' settings based on RF2 import", resourceUri.getResourceId()))
 				.execute(context.service(IEventBus.class))