:arrow_up: deps: Upgrade actions/checkout action to v4

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
actions/checkout	action	major	v3 -> v4

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Release Notes

actions/checkout (actions/checkout)

### [`v4`](https://togithub.com/actions/checkout/blob/HEAD/CHANGELOG.md#v400) [Compare Source](https://togithub.com/actions/checkout/compare/v3...v4) - [Support fetching without the --progress option](https://togithub.com/actions/checkout/pull/1067) - [Update to node20](https://togithub.com/actions/checkout/pull/1436)

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Configuration

📅 Schedule: Branch creation - "after 10pm every weekday,before 5am every weekday,every weekend" (UTC), Automerge - At any time (no schedule defined).

🚦 Automerge: Enabled.

♻ Rebasing: Whenever PR becomes conflicted, 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

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[codecov-commenter]

Codecov Report

Patch and project coverage have no change.

Comparison is base (581e390) 100.00% compared to head (08ae2bb) 100.00%.

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Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #261 +/- ## ========================================= Coverage 100.00% 100.00% ========================================= Files 2 2 Lines 115 115 ========================================= Hits 115 115 ```

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