Update k8soper_1.py

k8soper_1.py

@@ -19,7 +19,7 @@ task_default_args = {
     'depends_on_past': False,
     'email': ['jh_won@lotte.net'],
     'email_on_retry': False,
-    'email_on_failure': True,
+    'email_on_failure': False,
     'execution_timeout': timedelta(hours=1)
 }