[1.3.8-prepare][Fix-6025][UI] Fix view history error (#6049)

Author: chengshiwen

Diff for: dolphinscheduler-ui/src/js/conf/home/pages/dag/_source/formModel/formModel.vue

@@ -394,7 +394,7 @@
       _seeHistory () {
         this.self.$router.push({
           name: 'task-instance',
-          params: { projectId: this.projectId },
+          params: { projectId: this.self.projectId },
           query: {
             processInstanceId: this.self.$route.params.id,
             taskName: this.backfillItem.name