Update actions/checkout action to v6

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
actions/checkout	action	major	v5.0.0 -> v6.0.1

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Release Notes

actions/checkout (actions/checkout)

v6.0.1

Compare Source

v6.0.0

Compare Source

v5.0.1

Compare Source

What's Changed

• Port v6 cleanup to v5 by @​ericsciple in #​2301

Full Changelog: actions/checkout@v5...v5.0.1

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Configuration

📅 Schedule: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR is behind base branch, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

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• If you want to rebase/retry this PR, check this box

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[coderabbitai]

Walkthrough

GitHub Actions workflows across the repository were updated to use a newer version of the checkout action. The actions/checkout step was upgraded from v5.0.0 to v6.0.0 across all workflow files, with no modifications to other steps, parameters, or control flow logic.

Changes

Cohort / File(s)	Summary
GitHub Actions checkout action upgrade .github/workflows/changeset.yml, .github/workflows/cla.yml, .github/workflows/compile-cairo-alpha-project.yml, .github/workflows/compile-cairo-project.yml, .github/workflows/publish.yml, .github/workflows/test.yml, .github/workflows/version.yml	Upgraded actions/checkout from v5.0.0 (commit 08c6903) to v6.0.0 (commit 1af3b93). All other workflow steps and parameters unchanged.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

• All changes are identical across files (same action version upgrade)
• No logic modifications or behavioral changes
• External dependency update only

Pre-merge checks and finishing touches

✅ Passed checks (3 passed)

Check name	Status	Explanation
Title check	✅ Passed	The pull request title clearly summarizes the main change: upgrading the actions/checkout GitHub Action from v5 to v6 across all workflow files.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Description check	✅ Passed	The PR description clearly describes the changeset: updating actions/checkout from v5.0.0 to v6.0.1, with relevant release notes and context provided.

✨ Finishing touches

• 📝 Generate docstrings

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch renovate/actions-checkout-6.x

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