fix(crons): Add missing CSRF exemption for checkin PUT (#45699)

related to #45694
Refs #45690

Author: David Wang

src/sentry/api/urls.py

@@ -1342,6 +1342,7 @@
         r"^(?P<organization_slug>[^\/]+)/monitors/(?P<monitor_id>[^\/]+)/checkins/(?P<checkin_id>[^\/]+)/$",
         method_dispatch(
             PUT=MonitorIngestCheckInDetailsEndpoint.as_view(),  # Legacy ingest endpoint
+            csrf_exempt=True,
         ),
         name="sentry-api-0-organization-monitor-check-in-details",
     ),