fixed: 会签汇总办理至上级汇总时会错误的更新节点为发起会签

src/Hotline/FlowEngine/Workflows/WorkflowDomainService.cs

@@ -441,7 +441,7 @@ namespace Hotline.FlowEngine.Workflows
                 ECountersignPosition.None => dto.IsStartCountersign,
                 ECountersignPosition.Multi => !dto.BackToCountersignEnd,
                 ECountersignPosition.Single => !dto.BackToCountersignEnd,
-                ECountersignPosition.End => workflow.IsInCountersign || dto.IsStartCountersign,
+                ECountersignPosition.End => !dto.BackToCountersignEnd && (workflow.IsInCountersign || dto.IsStartCountersign),
                 _ => throw new ArgumentOutOfRangeException()
             };