Add minor changes

hyrax/app/services/hyrax/workflow/register_doi.rb

@@ -11,9 +11,9 @@ module Hyrax
     # Genrate DOI for dataset
     module RegisterDoi
       def self.call(target:, **)
-        return true if ENV.fetch('REGISTER_DOI', 'true') == 'false'
+        RegisterDoiWorker.perform_async(target.id, target.class.name) if ENV.fetch('REGISTER_DOI', 'true') == 'true'
 
-        RegisterDoiWorker.perform_async(target.id, target.class.name)
+        return true
       end
     end
   end