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#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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dogmatic69 / nordigen-homeassistant

chore(deps): update actions/checkout action to v4 #17

Release Notes

Configuration