hot_region_storage: Fix a typo in comment

[ZzzhHe]

What problem does this PR solve?

Issue Number: ref #6989

What is changed and how does it work?

https://github.com/tikv/pd/blob/50368e57bde37a4e4994ffe4da4394433799ac71/pkg/storage/hot_region_storage.go#L93

* fix a typo by changing "PackHistoryHotWriteRegions" to "PackHistoryHotReadRegions"

Check List

None

Release note

None.

[ti-chi-bot]

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[ti-chi-bot]

Hi @ZhuohaoHe. Thanks for your PR.

I'm waiting for a tikv member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

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[HuSharp]

Thanks for your work!
btw, I noticed a missing s in the comment for GetHotRegionsWriteInterval, Could you help fix that as well?

[HuSharp]

Please use option git commit -s to sign off your commits :)
https://github.com/tikv/pd/blob/master/CONTRIBUTING.md#signing-off-the-commit

[HuSharp]

/ok-to-test