Update actions/checkout action to v6

[balena-renovate]

This PR contains the following updates:

Package	Type	Update	Change
actions/checkout	action	major	v4.3.1 → v6.0.2

---

Warning

Some dependencies could not be looked up. Check the Dependency Dashboard for more information.

---

Release Notes

actions/checkout (actions/checkout)

v6.0.2

Compare Source

• Fix tag handling: preserve annotations and explicit fetch-tags by @​ericsciple in #​2356

v6.0.1

Compare Source

• Add worktree support for persist-credentials includeIf by @​ericsciple in #​2327

v6.0.0

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

v5.0.1

Compare Source

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

v5.0.0

Compare Source

• Update actions checkout to use node 24 by @​salmanmkc in #​2226

---

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.

---

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

---

This PR has been generated by Renovate Bot.