robocop fixes

Author: THardy98

polling/infrequent/compose_greeting_activity.rb

@@ -15,4 +15,4 @@ def execute(input)
       )
     end
   end
-end
+end

polling/infrequent/greeting_workflow.rb

@@ -18,4 +18,4 @@ def execute(name)
       )
     end
   end
-end
+end

polling/infrequent/test_service.rb

@@ -23,4 +23,4 @@ def get_service_result(input, activity_info)
     "#{input['greeting']}, #{input['name']}!"
   end
   module_function :get_service_result
-end 
+end