zh: scale a tidb cluster #7445

Job	Run time
check-manual-line-breaks	11s
check-file-encoding	11s
check-git-conflicts	7s
check-control-characters	8s
check-unclosed-tags	8s
markdownlint	19s
verify-internal-link-anchors	12s
verify-internal-links	12s
	1m 28s

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