update hardware requirement for disaggregated tiflash

[guo-shaoge]

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• This PR is translated from: https://github.com/pingcap/docs-cn/pull/16707
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• [ ] Delete files
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[Oreoxmt]

/cc @joey-yez

[ti-chi-bot[bot]]

[LGTM Timeline notifier]

Timeline:

• 2024-03-12 05:47:03.888811587 +0000 UTC m=+750850.911057976: :ballot_box_with_check: agreed by Oreoxmt.
• 2024-03-12 06:14:34.869445192 +0000 UTC m=+752501.891691581: :ballot_box_with_check: agreed by hfxsd.

[Oreoxmt]

/approve

[ti-chi-bot[bot]]

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[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-7.1: #16731.

[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-7.4: #16732.

[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-7.5: #16733.

[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-7.6: #16734.