chore(deps): update actions/checkout action to v4 (#167)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [actions/checkout](https://github.com/actions/checkout) | action | major | `v3` -> `v4` |

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> ⚠️ **Warning**
>
> Some dependencies could not be looked up. Check the Dependency Dashboard for more information.

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### Release Notes

<details>
<summary>actions/checkout (actions/checkout)</summary>

### [`v4`](https://github.com/actions/checkout/blob/HEAD/CHANGELOG.md#v417)

[Compare Source](https://github.com/actions/checkout/compare/v3...v4)

-   Bump the minor-npm-dependencies group across 1 directory with 4 updates by [@&#8203;dependabot](https://github.com/dependabot) in https://github.com/actions/checkout/pull/1739
-   Bump actions/checkout from 3 to 4 by [@&#8203;dependabot](https://github.com/dependabot) in https://github.com/actions/checkout/pull/1697
-   Check out other refs/\* by commit by [@&#8203;orhantoy](https://github.com/orhantoy) in https://github.com/actions/checkout/pull/1774
-   Pin actions/checkout's own workflows to a known, good, stable version. by [@&#8203;jww3](https://github.com/jww3) in https://github.com/actions/checkout/pull/1776

</details>

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### Configuration

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♻ **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 this update again.

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This PR has been generated by [Renovate Bot](https://github.com/renovatebot/renovate).
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Reviewed-on: #167
Co-authored-by: Renovate Bot <renovate@mgrote.net>
Co-committed-by: Renovate Bot <renovate@mgrote.net>

.gitea/workflows/ansible-lint.yaml

@@ -8,7 +8,7 @@ jobs:
   ansible-lint:
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: write vault-pass
         run: echo ${{ secrets.VAULTPASS }} > ./vault-pass

.gitea/workflows/gitleaks.yaml

@@ -8,7 +8,7 @@ jobs:
   gitleaks:
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Run Gitleaks
         uses: docker://zricethezav/gitleaks:v8.18.4