Build(deps): Bump actions/checkout from 4 to 6 (#578)

Bumps [actions/checkout](https://github.com/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...v6)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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/test_and_publish.yml

@@ -87,7 +87,7 @@ jobs:
     steps:
 
     # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v6
 
     # Setup Python
     - name: Set up Python ${{ matrix.python-version }}
@@ -190,7 +190,7 @@ jobs:
 
     steps:
 
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v6
 
     - name: Set up Python 3.10
       uses: actions/setup-python@v6