Bump actions/checkout from 3.5.2 to 4.0.0

Bumps [actions/checkout](https://github.com/actions/checkout) from 3.5.2 to 4.0.0.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v3.5.2...v4.0.0)

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

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/ci.yml

@@ -19,7 +19,7 @@ jobs:
     runs-on: ubuntu-22.04
     steps:
       - name: Checkout the code
-        uses: actions/checkout@v3.5.2
+        uses: actions/checkout@v4.0.0
         with:
           fetch-depth: 0
       - name: Set up Python
@@ -40,7 +40,7 @@ jobs:
     runs-on: ubuntu-22.04
     steps:
       - name: Checkout the code
-        uses: actions/checkout@v3.5.2
+        uses: actions/checkout@v4.0.0
         with:
           fetch-depth: 0
       - name: Set up Python
@@ -71,7 +71,7 @@ jobs:
     if: github.event_name == 'push' && contains(github.ref, 'refs/tags/')
     steps:
       - name: Checkout the code
-        uses: actions/checkout@v3.5.2
+        uses: actions/checkout@v4.0.0
         with:
           fetch-depth: 0
       - name: Set up Python