Bump actions/checkout from 4 to 6 in the github-actions group (#36)

Bumps the github-actions group with 1 update: [actions/checkout](https://github.com/actions/checkout).


Updates `actions/checkout` from 4 to 6
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v4...v5)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '5'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: github-actions
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/spelling.yml

@@ -16,7 +16,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
 
     - name: Check spelling
       uses: crate-ci/typos@master

.github/workflows/test.yml

@@ -27,7 +27,7 @@ jobs:
 
     steps:
     - name: "Checkout repository"
-      uses: "actions/checkout@v4"
+      uses: "actions/checkout@v6"
 
     - name: "Set up PHP"
       uses: "shivammathur/setup-php@v2"