Update GitHub Action actions/checkout to v6.0.1

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
actions/checkout	action	patch	v6.0.0 → v6.0.1

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Release Notes

actions/checkout (actions/checkout)

v6.0.1

Compare Source

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Configuration

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🚦 Automerge: Enabled.

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Project	Deployment	Review	Updated (UTC)
petrinaut-hazel	Ready	Preview, Comment	Dec 13, 2025 0:31am

[cursor]

PR Summary

Updates actions/checkout from v6.0.0 to v6.0.1 across the Rust workflow (setup, lint, test jobs).

• CI / GitHub Actions:
  • Update actions/checkout to v6.0.1 in .github/workflows/rust.yml for the setup, lint, and test jobs.

^{Written by Cursor Bugbot for commit dedda99. This will update automatically on new commits. Configure here.}