check-before-deployment: fix TuneD custom profile path

[doc-claw-bot]

What is changed, added or deleted? (Required)

• Clarify the TuneD custom profile path in check-before-deployment.md.
• Add version-specific command examples for both path formats:
  • TuneD earlier than v2.23.0: /etc/tuned/<profile_name>/tuned.conf
  • TuneD v2.23.0 and later: /etc/tuned/profiles/<profile_name>/tuned.conf
• Explain that each path format is only recognized by its corresponding TuneD version range.

Which TiDB version(s) do your changes apply to? (Required)

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• master (the latest development version)
• v8.5 (TiDB 8.5 versions)
• v8.4 (TiDB 8.4 versions)
• v8.3 (TiDB 8.3 versions)
• v8.2 (TiDB 8.2 versions)
• v8.1 (TiDB 8.1 versions)
• v7.5 (TiDB 7.5 versions)
• v7.1 (TiDB 7.1 versions)
• v6.5 (TiDB 6.5 versions)

What is the related PR or file link(s)?

• This PR is translated from: check-before-deployment: fix TuneD custom profile path docs#23775
• Other reference link(s):
  • https://github.com/redhat-performance/tuned/blob/v2.22.0/man/tuned.conf.5
  • https://github.com/redhat-performance/tuned/blob/v2.23.0/man/tuned.conf.5

AI agent involvement

• The changes in this PR were primarily made by an AI agent on behalf of the PR author.

Do your changes match any of the following descriptions?

• Delete files
• Change aliases
• Need modification after applied to another branch
• Might cause conflicts after applied to another branch

Summary by CodeRabbit

• 文档
  • 更新 TuneD 自定义策略的配置路径说明。
  • 补充版本差异：TuneD v2.23.0 之前使用 /etc/tuned/<profile_name>/tuned.conf，v2.23.0 及以上使用 /etc/tuned/profiles/<profile_name>/tuned.conf。
  • 明确两种路径格式仅适用于对应版本，避免自定义策略无法被识别。

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📝 Walkthrough

Walkthrough

更新 TuneD 自定义策略的目录路径，并补充 TuneD v2.23.0 前后的版本要求。

Changes

TuneD 策略路径

Layer / File(s)	Summary
更新自定义策略路径 check-before-deployment.md	TuneD v2.23.0 之前使用 /etc/tuned/balanced-tidb-optimal/。TuneD v2.23.0 及以上版本使用 /etc/tuned/profiles/balanced-tidb-optimal/。两种路径不能跨版本使用。

Estimated code review effort: 1 (Trivial) | ~2 minutes

Merge Risk: 🔵 Low · up to 3e69a

The documentation correctly distinguishes the default TuneD paths by version, but users with customized profile directories may create profiles in a location TuneD does not scan. Clarify that the paths apply to default configuration before merging.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0…
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Title check	✅ Passed	标题准确概括了主要变更：修复 TuneD 自定义 profile 路径。标题简洁且具体。
Description check	✅ Passed	描述包含变更内容、适用版本、相关链接、AI 参与情况和其他检查项。内容与 PR 目标一致，满足模板的关键要求。

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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Actionable comments posted: 1

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