chore(deps): update actions/checkout action to v4 (#60)

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This PR contains the following updates:

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

---

### Release Notes

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

###
[`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)

</details>

---

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.github/workflows/laravel.yml

@@ -15,7 +15,7 @@ jobs:
     - uses: shivammathur/setup-php@e8cd65f444039503a75cf4057d55442fc4316f78
       with:
         php-version: '8.1'
-    - uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744 # v3
+    - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4
     - name: Copy .env
       run: php -r "file_exists('.env') || copy('.env.example', '.env');"
     - name: Install Dependencies