fix type cronjob (#13696)

Associated with #13695

content/en/docs/concepts/workloads/controllers/cron-jobs.md

@@ -16,7 +16,7 @@ One CronJob object is like one line of a _crontab_ (cron table) file. It runs a
 on a given schedule, written in [Cron](https://en.wikipedia.org/wiki/Cron) format.
 
 {{< note >}}
-All **CronJob** `schedule:` times are based the timezone of the master where the job is initiated.
+All **CronJob** `schedule:` times are based on the timezone of the master where the job is initiated.
 {{< /note >}}
 
 For instructions on creating and working with cron jobs, and for an example of a spec file for a cron job, see [Running automated tasks with cron jobs](/docs/tasks/job/automated-tasks-with-cron-jobs).