update snapshot

Author: Assem-Uber

src/utils/data-formatters/format-workflow-history-event/__tests__/index.test.ts.snapshot

@@ -47,7 +47,7 @@ exports[`formatWorkflowHistoryEvent should format workflow activityTaskFailedEve
   "eventId": 11,
   "eventType": "ActivityTaskFailed",
   "identity": "cadence@958ab341-a376-431n-a17a-ed7d8a97ba91",
-  "reason": "",
+  "reason": null,
   "scheduledEventId": 7,
   "startedEventId": 9,
   "taskId": "22647174813",
@@ -186,7 +186,7 @@ exports[`formatWorkflowHistoryEvent should format workflow childWorkflowExecutio
   "eventId": 47,
   "eventType": "ChildWorkflowExecutionFailed",
   "initiatedEventId": 40,
-  "reason": "",
+  "reason": null,
   "startedEventId": 42,
   "taskId": "5877269789",
   "timestamp": 2024-09-08T04:27:58.993Z,
@@ -290,7 +290,7 @@ exports[`formatWorkflowHistoryEvent should format workflow decisionTaskFailedEve
   "forkEventVersion": 0,
   "identity": "cadence@958ab341-a375-431b-a27a-ed7d8a97ba91",
   "newRunId": "",
-  "reason": "",
+  "reason": null,
   "requestId": "66f7f58b-3d3b-4178-972a-fa7825ceec39",
   "scheduledEventId": 2,
   "startedEventId": 3,