update hardware requirement for disaggregated tiflash

[guo-shaoge]

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• [ ] v7.6 (TiDB 7.6 versions)
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• This PR is translated from: https://github.com/pingcap/docs/pull/16642
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• [ ] Delete files
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[Oreoxmt]

/cc @joey-yez

[ti-chi-bot[bot]]

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[ti-chi-bot[bot]]

@zanmato1984: adding LGTM is restricted to approvers and reviewers in OWNERS files.

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@JaySon-Huang: adding LGTM is restricted to approvers and reviewers in OWNERS files.

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[guo-shaoge]

@Oreoxmt ptal

[ti-chi-bot[bot]]

[LGTM Timeline notifier]

Timeline:

• 2024-03-12 06:07:21.094952264 +0000 UTC m=+752068.117198652: :ballot_box_with_check: agreed by hfxsd.
• 2024-03-12 06:34:55.518829635 +0000 UTC m=+753722.541076023: :ballot_box_with_check: agreed by Oreoxmt.

[Oreoxmt]

/approve

[ti-chi-bot[bot]]

[APPROVALNOTIFIER] This PR is APPROVED

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[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-7.1: #16809.

[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-7.4: #16810.

[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-7.5: #16811.

[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-7.6: #16812.