Update actions/checkout action to v6

[renovate]

This PR contains the following updates:

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

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Release Notes

actions/checkout (actions/checkout)

v6

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 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.

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[leonard84]

@Vampire, is it possible to get Renovate to update the Kotlin files as well?

[Vampire]

Yes, but we should not currently.
As I already wrote in two other PRs before.
We can do something like

packageRules: [
  {
    groupName: "actions-checkout",
    matchPackageNames: [
      "actions/checkout",
      "/^actions:checkout(__.*)?$/"
    ]
  }
]

But this currently produces rubbish as Renovate has f***** up maven range handling.

After renovatebot/renovate#37703 got a helpful answer, or most probably after my bug-fixes at https://github.com/renovatebot/renovate/pulls/Vampire were merged, we should be able to make the according configuration.

Until then it is good that the PRs are not mergeable, as they produce rubbish.
Alternatively we could for the time being disable those updates.

[leonard84]

If I see it correctly, typesafegithub does not even support v6 at the moment.

[leonard84]

typesafegithub/github-actions-typing-catalog#123