Update monitor-a-tidb-cluster.md

[lilyjazz]

First-time contributors' checklist

• I've signed Contributor License Agreement that's required for repo owners to accept my contribution.

What is changed, added, or deleted? (Required)

Which TiDB Operator version(s) do your changes apply to? (Required)

• master (the latest development version)
• v1.3 (TiDB Operator 1.3 versions)
• v1.2 (TiDB Operator 1.2 versions)
• v1.1 (TiDB Operator 1.1 versions)
• v1.0 (TiDB Operator 1.0 versions)

What is the related PR or file link(s)?

• This PR is translated from:
• Other reference link(s):

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• ran-huang

To complete the pull request process, please ask the reviewers in the list to review by filling /cc @reviewer in the comment.
After your PR has acquired the required number of LGTMs, you can assign this pull request to the committer in the list by filling /assign @committer in the comment to help you merge this pull request.

The full list of commands accepted by this bot can be found here.

Details

Reviewer can indicate their review by submitting an approval review.
Reviewer can cancel approval by submitting a request changes review.

[CLAassistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you all sign our Contributor License Agreement before we can accept your contribution.
1 out of 2 committers have signed the CLA.

✅ ran-huang
❌ lilyjazz
_{You have signed the CLA already but the status is still pending? Let us recheck it.}

[ran-huang]

这里 TransferBinlog 是写错了吗，还是这个面板就叫这个名字？

[ran-huang]

Rest LGTM

[Oreoxmt]

Please update the base branch for this PR from master to release-1.x, as release-1.x is now the active development branch for TiDB Operator v1.x documentation.