Bump actions/checkout from 3 to 4 (#4855)

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

.github/workflows/acceptance_tests_cpython.yml

@@ -32,7 +32,7 @@ jobs:
 
     name: Python ${{ matrix.python-version }} on ${{ matrix.os }}
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Setup python for starting the tests
         uses: actions/setup-python@v4.7.1

.github/workflows/acceptance_tests_cpython_pr.yml

@@ -26,7 +26,7 @@ jobs:
 
     name: Python ${{ matrix.python-version }} on ${{ matrix.os }}
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Setup python for starting the tests
         uses: actions/setup-python@v4.7.1

.github/workflows/unit_tests.yml

@@ -28,7 +28,7 @@ jobs:
 
     name: Python ${{ matrix.python-version }} on ${{ matrix.os }}
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Setup python ${{ matrix.python-version }}
         uses: actions/setup-python@v4.7.1

.github/workflows/unit_tests_pr.yml

@@ -21,7 +21,7 @@ jobs:
 
     name: Python ${{ matrix.python-version }} on ${{ matrix.os }}
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Setup python ${{ matrix.python-version }}
         uses: actions/setup-python@v4.7.1