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

This PR contains the following updates:

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

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)

Configuration

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berlin / haushaltsdaten

chore(deps): update actions/checkout action to v4 #110

Release Notes

Configuration