zh-trans: add cronjob.md (#11224)

* zh-trans: add cronjob.md

zh-trans: add cronjob.md

* Update cronjob.md

* Update cronjob.md

content/zh/docs/reference/glossary/cronjob.md

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+---
+title: CronJob
+id: cronjob
+date: 2018-04-12
+full_link: /docs/concepts/workloads/controllers/cron-jobs/
+short_description: >
+  管理定期运行的 [Job](/docs/concepts/workloads/controllers/jobs-run-to-completion/)。
+
+aka: 
+tags:
+- core-object
+- workload
+---
+
+<!--
+---
+title: CronJob
+id: cronjob
+date: 2018-04-12
+full_link: /docs/concepts/workloads/controllers/cron-jobs/
+short_description: >
+  Manages a [Job](/docs/concepts/workloads/controllers/jobs-run-to-completion/) that runs on a periodic schedule.
+
+aka: 
+tags:
+- core-object
+- workload
+---
+-->
+
+<!--
+ Manages a [Job](/docs/concepts/workloads/controllers/jobs-run-to-completion/) that runs on a periodic schedule.
+-->
+
+ 管理定期运行的 [Job](/docs/concepts/workloads/controllers/jobs-run-to-completion/)。
+
+<!--more--> 
+
+<!--
+Similar to a line in a *crontab* file, a Cronjob object specifies a schedule using the [Cron](https://en.wikipedia.org/wiki/Cron) format.
+-->
+
+Cronjob 对象类似 *crontab* 文件中的一行命令，它声明了一个遵循 [Cron](https://en.wikipedia.org/wiki/Cron) 格式的调度任务。