Fix triggers for backup jobs

Fixes: PROD-32365

Change-Id: I10c1669ea89796ca1767a5c8a886cb6b412b5fac
diff --git a/jenkins/client/job/deploy/backupninja_backup.yml b/jenkins/client/job/deploy/backupninja_backup.yml
index 9f61701..147b32b 100644
--- a/jenkins/client/job/deploy/backupninja_backup.yml
+++ b/jenkins/client/job/deploy/backupninja_backup.yml
@@ -26,5 +26,7 @@
             ASK_CONFIRMATION:
               type: boolean
               default: 'true'
-          triggers:
-            - timed: "${_param:backup_min} ${_param:backup_hour} ${_param:backup_day_of_month} ${_param:backup_month} ${_param:backup_day_of_week}"
+          trigger:
+            timer:
+              enabled: true
+              spec: "${_param:backup_min} ${_param:backup_hour} ${_param:backup_day_of_month} ${_param:backup_month} ${_param:backup_day_of_week}"