Update actions/checkout digest to 3d3c42e

[renovate]

📚 IxDF Renovate configuration • security PRs are labelled security and require manual review.

This PR contains the following updates:

Package	Type	Update	Change
actions/checkout (changelog)	action	digest	9c091bb → 3d3c42e

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Configuration

📅 Schedule: (in timezone UTC)

• Branch creation
  • At 12:00 AM through 04:59 AM and 10:00 PM through 11:59 PM, Monday through Friday (* 0-4,22-23 * * 1-5)
  • Only on Sunday and Saturday (* * * * 0,6)
• 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.

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