Update dashboard-slow-query.md

[lilyjazz]

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[ti-chi-bot]

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[time-and-fate]

https://docs.pingcap.com/zh/tidb/stable/dashboard-statement-details
这个页面需要加对应的文档吗？

[shichun-0415]

https://docs.pingcap.com/zh/tidb/stable/dashboard-statement-details 这个页面需要加对应的文档吗？

@time-and-fate Fixed in 10f88d9. PTAL.

[time-and-fate]

内容上我没问题了。
不过看起来 media/dashboard/dashboard-visual-plan-Diagnosis.png 和 media/dashboard/dashboard-visual-plan.png 没有用到。

[Oreoxmt]

LGTM

[shichun-0415]

/verify

[shichun-0415]

/remove status LGT1
/status LGT2

[shichun-0415]

/merge

[ti-chi-bot]

This pull request has been accepted and is ready to merge.

Commit hash: ab08f53