Bump actions/checkout from 2 to 4 (#60)

Bumps [actions/checkout](https://github.com/actions/checkout) from 2 to 4.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v2...v4)

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

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

.github/workflows/array-api-tests.yml

@@ -35,11 +35,11 @@ jobs:
 
     steps:
     - name: Checkout array-api-compat
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
       with:
         path: array-api-compat
     - name: Checkout array-api-tests
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
       with:
         repository: data-apis/array-api-tests
         submodules: 'true'

.github/workflows/publish-package.yml

@@ -30,7 +30,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
       with:
         fetch-depth: 0
 

.github/workflows/tests.yml

@@ -8,7 +8,7 @@ jobs:
         python-version: ['3.8', '3.9', '3.10', '3.11']
       fail-fast: true
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - uses: actions/setup-python@v2
         with:
           python-version: ${{ matrix.python-version }}