Update spark_kubernetes_sensor.py

mount-dags-gitsync/dags/stackable/spark_kubernetes_sensor.py

@@ -7,6 +7,8 @@ from airflow.providers.cncf.kubernetes.hooks.kubernetes import KubernetesHook
 
 class SparkKubernetesSensor(BaseSensorOperator):
     template_fields = ("application_name", "namespace")
+    # See https://github.com/stackabletech/spark-k8s-operator/pull/460/files#diff-d737837121132af6b60f50279a78464b05dcfd06c05d1d090f4198a5e962b5f6R371
+    # Unknown is set immediately so it must be excluded from the faield states.
     #FAILURE_STATES = ("Failed", "Unknown")
     FAILURE_STATES = ("Failed")
     SUCCESS_STATES = "Succeeded"