Bump actions/checkout from 2 to 4

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] <support@github.com>

.github/workflows/ruby-build.yml

@@ -254,7 +254,7 @@ jobs:
           # jq is available in epel-release (https://docs.fedoraproject.org/en-US/epel/)
           yum install -y gh unzip epel-release
           yum install -y jq
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Fetch CodeQL
         uses: ./.github/actions/fetch-codeql