fix tests

Author: ameliahsu

tests/sentry/monitors/endpoints/test_organization_detector_details.py

@@ -59,6 +59,7 @@ def test_get_monitor_incident_detector_details(self):
             "id": str(self.detector.id),
             "projectId": str(self.project.id),
             "name": "Monitor Incident Detector",
+            "description": None,
             "type": MonitorIncidentType.slug,
             "workflowIds": [],
             "owner": {

tests/sentry/monitors/endpoints/test_organization_detector_index.py

@@ -58,6 +58,7 @@ def test_list_monitor_incident_detectors(self):
                 "id": str(self.detector.id),
                 "projectId": str(self.project.id),
                 "name": "Original Detector",
+                "description": None,
                 "type": MonitorIncidentType.slug,
                 "workflowIds": [],
                 "owner": None,