chore(deps): update actions/checkout action to v6

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
actions/checkout	action	major	v4 → v6

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Release Notes

actions/checkout (actions/checkout)

v6

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v5

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1. .github/workflows/pre-commit.yml:16

• Draft comment:
  Upgrade to actions/checkout v6 looks fine. Please double-check if there are any new defaults or required parameters in v6 compared to v4 that could affect repository checkout behavior.
• Reason this comment was not posted:
  Confidence changes required: 0% <= threshold 50% None

Workflow ID: wflow_Ne6gZ6FHrxsYjiR4

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