Update revert url to start with / (#2310)

diff --git a/cron.yaml b/cron.yaml
index 265938f..9204aa2 100644
--- a/cron.yaml
+++ b/cron.yaml
@@ -49,6 +49,6 @@
   schedule: every 1 minutes
 
 - description: check revert review issues for closed issues to update in our database
-  url: 'api/update-revert-issues'
+  url: '/api/update-revert-issues'
   target: auto-submit
   schedule: every 24 hours