pre-commit: update 'cython-lint' to 0.21.1

[jameslamb]

Description

Contributes to rapidsai/build-planning#317

cython-lint 0.21.1 contains a fix for compatibility with Cython 3.3.0+. This PR hopefully avoids us needing to bump cython-lint when cuDF starts using Cython 3.3.0+.

Notes for Reviewers

I left all the other pins in place

My understanding from #23767 was that cuDF intends to have a consistent upper bound on Cython everywhere (conda recipes, wheel dependencies, pre-commit, etc.).

So even though that <3.3.0a0 ceiling is no longer necessary for cython-lint to work as of this PR, I left it alone.

Checklist

• I am familiar with the Contributing Guidelines.
• New or existing tests cover these changes.
• The documentation is up to date with these changes.

[coderabbitai]

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ℹ️ Recent review info

⚙️ Run configuration

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📥 Commits

Reviewing files that changed from the base of the PR and between 09dfa18 and 30dc755.

📒 Files selected for processing (1)

• .pre-commit-config.yaml

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📝 Walkthrough

Summary by CodeRabbit

• Chores
  • Updated the code quality check tooling to a newer patch version.

Walkthrough

The pre-commit configuration updates the cython-lint hook from revision v0.21.0 to v0.21.1.

Changes

Pre-commit hook maintenance

Layer / File(s)	Summary
Update cython-lint revision .pre-commit-config.yaml	The cython-lint hook now uses revision v0.21.1 instead of v0.21.0.

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

Merge Risk: ⚪ Minimal · up to 30dc7

This localized change updates the pre-commit cython-lint version for Cython 3.3.0+ compatibility without introducing an actionable merge-blocking risk.

Suggested reviewers: kylefromnvidia, bdice, vyasr

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description check	✅ Passed	The description explains the cython-lint version update, its Cython 3.3.0+ compatibility purpose, and the unchanged version pins. It is directly related to the changeset.
Title check	✅ Passed	The title clearly and concisely identifies the pre-commit cython-lint update from the changeset.
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.

Full details: Docstring Coverage

Explanation

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 files. (1 skipped: 1 unsupported.)

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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[jakirkham]

The triage job looked stuck. It was queued for ~5hrs. Tried removing and readding a label. Then just tried restarting it.

[jakirkham]

Ok looks like updating the branch did the trick

[jakirkham]

/merge