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

[thomhurst]

This PR contains the following updates:

Package	Type	Update	Change
actions/checkout	action	major	v4 → v6
actions/checkout	action	major	v5 → v6

---

Release Notes

actions/checkout (actions/checkout)

v6

Compare Source

• Persist creds to a separate file by @​ericsciple in #​2286
• Update README to include Node.js 24 support details and requirements by @​salmanmkc in #​2248

v5

Compare Source

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

---

Configuration

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

🚦 Automerge: Disabled because a matching PR was automerged previously.

♻ 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 these updates again.

---

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

---

This PR has been generated by Renovate Bot.

[Copilot]

Pull request overview

This PR updates the actions/checkout GitHub Action from v4 to v6 across all workflow files. This is a major version upgrade that includes important changes such as persisting credentials to a separate file and updated Node.js support (Node.js 24). The update has been comprehensively applied across all 11 workflow files that use the checkout action.

Key Changes

• Upgraded actions/checkout from v4 to v6 across all GitHub Actions workflows
• Ensures consistent use of the latest checkout action version throughout the repository
• Applies security and Node.js compatibility improvements from v6

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
.github/workflows/claude.yml	Updated checkout action to v6 in the Claude Code workflow
.github/workflows/claude-code-review.yml	Updated checkout action to v6 in the Claude Code Review workflow
.github/workflows/codeql.yml	Updated checkout action to v6 in the CodeQL Advanced workflow
.github/workflows/deploy-pages-test.yml	Updated checkout action to v6 in the test deployment workflow
.github/workflows/deploy-pages.yml	Updated checkout action to v6 in the production deployment workflow
.github/workflows/dotnet-build-different-locale.yml	Updated checkout action to v6 in the locale testing workflow
.github/workflows/dotnet.yml	Updated checkout action to v6 in the main .NET workflow
.github/workflows/generate-readme.yml	Updated checkout action to v6 in the README generation workflow
.github/workflows/speed-comparison.yml	Updated checkout action to v6 in all 4 jobs (build-test-artifacts, run-time-benchmarks, build-time-benchmarks, process-and-upload-benchmarks)

[thomhurst]

Summary

Updates actions/checkout from v4/v5 to v6 in GitHub Actions workflows.

Critical Issues

None found ✅

Suggestions

None - straightforward dependency update to latest stable version.

Verdict

✅ APPROVE - No critical issues

This is a clean infrastructure update. The changes only affect GitHub Actions workflow files and don't touch any TUnit code, so none of the TUnit-specific rules apply. The v6 update includes security improvements (separate credential persistence) and Node.js 24 support.

[thomhurst]

Summary

Updates GitHub Actions checkout action to v6 in Claude workflow files.

Critical Issues

None found ✅

Verdict

✅ APPROVE - No critical issues

This PR updates the actions/checkout action to the latest v6 version in two Claude-related workflow files. The changes are purely infrastructure updates and don't affect any TUnit code. Keeping GitHub Actions dependencies up-to-date is good practice for security and compatibility.