Update actions/checkout action to v4.2.2 (#16)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [actions/checkout](https://code.forgejo.org/actions/checkout) | action | patch | `v4.2.1` -> `v4.2.2` |

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### Release Notes

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

### [`v4.2.2`](https://code.forgejo.org/actions/checkout/blob/HEAD/CHANGELOG.md#v422)

[Compare Source](https://code.forgejo.org/actions/checkout/compare/v4.2.1...v4.2.2)

-   `url-helper.ts` now leverages well-known environment variables by [@&#8203;jww3](https://github.com/jww3) in https://github.com/actions/checkout/pull/1941
-   Expand unit test coverage for `isGhes` by [@&#8203;jww3](https://github.com/jww3) in https://github.com/actions/checkout/pull/1946

</details>

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### Configuration

📅 **Schedule**: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 **Automerge**: Enabled.

♻ **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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 - [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check this box

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This PR has been generated by [Renovate Bot](https://github.com/renovatebot/renovate).
<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiIzOC4xMjkuMiIsInVwZGF0ZWRJblZlciI6IjM4LjEyOS4yIiwidGFyZ2V0QnJhbmNoIjoibWFpbiIsImxhYmVscyI6W119-->

Reviewed-on: #16
Co-authored-by: Johnny5 <bot@snaile.de>
Co-committed-by: Johnny5 <bot@snaile.de>

.forgejo/workflows/renovate.yml

@@ -17,7 +17,7 @@ jobs:
       RENOVATE_GIT_AUTHOR: "Johnny5 <bot@snaile.de>"
 
     steps:
-      - uses: https://code.forgejo.org/actions/checkout@eef61447b9ff4aafe5dcd4e0bbf5d482be7e7871 # v4.2.1
+      - uses: https://code.forgejo.org/actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
 
       - name: Renovate
         run: renovate ${{ github.repository }}