doc: Add ivar comments for scheduletriggerresult (#34818) (#34839)

Author: kdestin

sdk/ml/azure-ai-ml/azure/ai/ml/entities/_schedule/schedule.py

@@ -483,6 +483,9 @@ class ScheduleTriggerResult:
     """Schedule trigger result returned by trigger an enabled schedule once.
 
     This class shouldn't be instantiated directly. Instead, it is used as the return type of schedule trigger.
+
+    :ivar str job_name:
+    :ivar str schedule_action_type:
     """
 
     def __init__(self, **kwargs):  # pylint: disable=unused-argument