fix: end step assign to user

src/Hotline/FlowEngine/Workflows/WorkflowDomainService.cs

@@ -2081,7 +2081,7 @@ namespace Hotline.FlowEngine.Workflows
                 OrgName = current.OrgName,
             };
 
-            var step = CreateStep(workflow, endStepDefine, prevStep, null, handler,
+            var step = CreateStep(workflow, endStepDefine, prevStep, EFlowAssignType.User, handler,
                  null, null, EWorkflowStepStatus.WaitForAccept,
                 ECountersignPosition.None, expiredTime, endStepDefine.Name, true);