cloud: remove v8.5.4 in release notes

[hfxsd]

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What is changed, added or deleted? (Required)

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• master (the latest development version)
• v9.0 (TiDB 9.0 versions)
• v8.5 (TiDB 8.5 versions)
• v8.1 (TiDB 8.1 versions)
• v7.5 (TiDB 7.5 versions)
• v7.1 (TiDB 7.1 versions)
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• v6.1 (TiDB 6.1 versions)
• v5.4 (TiDB 5.4 versions)

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• Delete files
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[gemini-code-assist]

Summary of Changes

Hello @hfxsd, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request cleans up the TiDB Cloud release notes by removing an entry that announced an upgrade of the default TiDB version for dedicated clusters. This ensures the documentation accurately reflects the current state or planned releases, preventing outdated or incorrect information from being published.

Highlights

• Release Notes Update: Removed the entry for November 27, 2025, which previously stated an upgrade of the default TiDB version for TiDB Cloud Dedicated clusters from v8.5.3 to v8.5.4.

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[gemini-code-assist]

Code Review

This pull request removes the release note entry for the TiDB v8.5.4 upgrade. The change is straightforward and correctly removes the relevant section from the release notes. For better tracking and context, it would be helpful to fill out the 'What is changed, added or deleted?' section in the pull request description for future contributions. Otherwise, the change looks good to me.

[ti-chi-bot]

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

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[ti-chi-bot]

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

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2025-12-03 02:05:50.664754387 +0000 UTC m=+401895.478531959: ☑️ agreed by qiancai.

[hfxsd]

/approve

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: hfxsd

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