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

[renovate]

This PR contains the following updates:

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

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Release Notes

actions/checkout (actions/checkout)

v6.0.0

Compare Source

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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 becomes conflicted, 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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[github-actions]

Renovate PR Review Results

⚖️ Safety Assessment: ✅ Safe

🔍 Release Content Analysis

• Node.js Support: Added Node.js 24 compatibility while maintaining backward compatibility
• Credential Handling: Changed to persist credentials to a separate file (internal implementation change)
• No Breaking Changes: No API changes or configuration parameter modifications required
• No Security Fixes: No security-related changes mentioned in release notes

🎯 Impact Scope Investigation

• Usage Locations: Found 9 instances of actions/checkout across 4 GitHub workflow files:
  • .github/workflows/ci.yml (4 instances)
  • .github/workflows/github-actions-lint.yml (3 instances)
  • .github/workflows/claude-renovate-review.yml (1 instance)
  • .github/workflows/release-please.yml (1 instance)
• Current Configuration: All instances use persist-credentials: false which remains fully compatible
• No Dependency Impact: This is a GitHub Action dependency, not affecting Go module dependencies
• Runtime Compatibility: All workflows run on ubuntu-latest which supports Node.js 24

💡 Recommended Actions

• Immediate Merge: Safe to merge without any code modifications required
• No Migration Needed: Existing persist-credentials: false configuration works identically
• Monitoring: No specific monitoring required as this is a non-breaking update
• Future Consideration: The improved credential handling provides better security isolation

🔗 Reference Links

• Release Notes v6.0.0
• Comparison v5.0.1...v6.0.0
• Changelog

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