ci(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] <support@github.com>

.github/workflows/datadog-sca.yaml

@@ -28,7 +28,7 @@ jobs:
     name: Datadog SBOM Generation and Upload
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Check imported libraries are secure and compliant
         id: datadog-software-composition-analysis
         uses: DataDog/datadog-sca-github-action@main

.github/workflows/datadog-static-analysis.yaml

@@ -28,7 +28,7 @@ jobs:
     name: Datadog Static Analyzer
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Check code meets quality and security standards
         id: datadog-static-analysis
         uses: DataDog/datadog-static-analyzer-github-action@v1