Bump actions/checkout from 3 to 4

Bumps [actions/checkout](https://github.com/actions/checkout) from 3 to 4.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v3...v4)

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

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/test.yml

@@ -21,7 +21,7 @@ jobs:
         platform: ["ubuntu-latest", "windows-latest"]
         python-version: [ "3.7", "3.8", "3.9", "3.10", "3.11" , "3.12-dev" ]
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Setup Python ${{ matrix.python-version }}
         uses: actions/setup-python@v4
@@ -45,7 +45,7 @@ jobs:
       matrix:
         python-version: [ "3.6", ]
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Setup Python ${{ matrix.python-version }}
         uses: actions/setup-python@v4