zh: scale a tidb cluster #7460

Job	Run time
check-file-encoding	8s
check-git-conflicts	7s
markdownlint	20s
verify-internal-link-anchors	9s
verify-internal-links	12s
check-control-characters	7s
check-manual-line-breaks	7s
check-unclosed-tags	9s
	1m 19s

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