Needs approval from an approver in each of these files:
- ~~[OWNERS](https://github.com/pingcap/docs-tidb-operator/blob/release-1.5/OWNERS)~~ [ran-huang]
Approvers can indicate their approval by writing `/approve` in a comment
Approvers can cancel approval by writing `/approve cancel` in a comment
This is an automated cherry-pick of #2422
First-time contributors' checklist
What is changed, added, or deleted? (Required)
Which TiDB Operator version(s) do your changes apply to? (Required)
What is the related PR or file link(s)?