!215 fix：审批不通过报错的问题

Merge pull request !215 from 蓝天白云下/ruoyi-self

yudao-module-bpm/yudao-module-bpm-biz/src/main/java/cn/iocoder/yudao/module/bpm/framework/flowable/core/listener/BpmTaskEventListener.java

@@ -63,7 +63,7 @@ public class BpmTaskEventListener extends AbstractFlowableEngineEventListener {
 
     @Override
     protected void activityCancelled(FlowableActivityCancelledEvent event) {
-        HistoricActivityInstance activity = activityService.getHistoricActivityByExecutionId(event.getExecutionId());
+        HistoricActivityInstance activity = activityService.getHistoricActivityByExecutionId(event.getActivityId());
         if (activity == null) {
             log.error("[activityCancelled][使用 executionId({}) 查找不到对应的活动实例]", event.getExecutionId());
             return;