chore(deps): update actions/checkout action to v4 (dev-main)

[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#v417) [Compare Source](https://togithub.com/actions/checkout/compare/v3...v4) - Bump the minor-npm-dependencies group across 1 directory with 4 updates by [@​dependabot](https://togithub.com/dependabot) in [https://github.com/actions/checkout/pull/1739](https://togithub.com/actions/checkout/pull/1739) - Bump actions/checkout from 3 to 4 by [@​dependabot](https://togithub.com/dependabot) in [https://github.com/actions/checkout/pull/1697](https://togithub.com/actions/checkout/pull/1697) - Check out other refs/\* by commit by [@​orhantoy](https://togithub.com/orhantoy) in [https://github.com/actions/checkout/pull/1774](https://togithub.com/actions/checkout/pull/1774) - Pin actions/checkout's own workflows to a known, good, stable version. by [@​jww3](https://togithub.com/jww3) in [https://github.com/actions/checkout/pull/1776](https://togithub.com/actions/checkout/pull/1776)

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Configuration

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[github-actions[bot]]

size-limit report 📦

Path	Size	Loading time (3g)	Running time (snapdragon)	Total time
./kipper/web/kipper-standalone.min.js	128.49 KB (0%)	2.6 s (0%)	3.2 s (+15.24% 🔺)	5.8 s
./kipper/web/kipper-standalone.js	128.54 KB (0%)	2.6 s (0%)	2.8 s (+6.02% 🔺)	5.4 s

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 83.88%. Comparing base (35a239a) to head (9c1b921).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## dev-main #578 +/- ## ========================================= Coverage 83.88% 83.88% ========================================= Files 66 66 Lines 2066 2066 Branches 252 252 ========================================= Hits 1733 1733 Misses 217 217 Partials 116 116 ```

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