deps: update actions/checkout action to v6

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
actions/checkout	action	major	v5.0.1 → v6.0.1

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Release Notes

actions/checkout (actions/checkout)

v6.0.1

Compare Source

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).

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♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

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[github-actions]

Do the documentation changes need to be backported?

Changes to /docs/docs won't be visible until the next release.
If you are fixing something in the docs that should be immediately visible, the changes needs to be made to both /docs/docs and /docs/versioned_docs/version-X.Y, where X.Y is the version of the latest minor release.
This can be done in this same PR.

• Yes, this should be backported to the current version of the docs.
• No, the PR only contains docs changes relevant for future versions.

[github-actions]

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2026-01-12 12:23 UTC