docs(flaky-tests): document collection-level quarantining settings

[samgutentag]

Summary

• Adds a "Collection-level quarantining settings" subsection to flaky-tests/quarantining.md
• Documents that Test Collections have their own quarantine settings page that overrides repo-level settings
• Covers both toggles (Enable Quarantining, Auto-Quarantine), admin-only restriction, and auto-quarantine disable behavior on collection quarantine off

Source

• trunk2 PR: https://github.com/trunk-io/trunk2/pull/3660

Test plan

• Preview in GitBook

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[claude]

Claude finished @samgutentag's task in 54s —— View job

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Review: Collection-level quarantining settings

• Read CLAUDE.md (none found)
• Read changed file and diff
• Review for typos, grammar, formatting, and documentation best practices

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The new subsection is well-written and follows the existing documentation patterns. Here are my findings:

No blocking issues. The content is accurate, clear, and consistently formatted.

Minor observations

1. Navigation path placeholder formatting (flaky-tests/quarantining.md, line 58):

   navigate to **Flaky Tests** > **Collections** > collection name > **Settings** > **Quarantining**
   

   collection name is the only item in the nav path that isn't bolded. Since it represents a dynamic/variable element, it could be italicized (_collection name_) to visually distinguish it as a placeholder — consistent with how placeholders are typically styled in docs. Very minor. Fix this →

2. Pre-existing issue (not introduced by this PR): The repo-level settings table (line 52) has a trailing empty row <tr><td></td><td></td></tr>. The new collection-level table correctly omits this — good catch.

What looks good

• Heading level (####) is consistent with the sibling #### Quarantining settings section
• The {% hint style="info" %} block is appropriately used for the admin-only restriction callout
• The disable behavior note at the end is clear and actionable
• Bold formatting on UI navigation elements is consistent throughout
• The em dash (—) in the final paragraph is used correctly

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[github-actions]

Auto-approved: Claude code review passed.