build(deps): 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/ci.yaml

@@ -32,7 +32,7 @@ jobs:
       S3_BUCKET: actions-s3-artifact-test
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Create python requirements, for caching
         run: |
           cat > requirements.txt <<-EOF
@@ -113,7 +113,7 @@ jobs:
       S3_BUCKET: actions-s3-artifact-test
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Create python requirements, for caching
         run: |
           cat > requirements.txt <<-EOF
@@ -225,7 +225,7 @@ jobs:
       S3_BUCKET: actions-s3-artifact-test
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Create python requirements, for caching
         run: |
           cat > requirements.txt <<-EOF