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/test.yml

@@ -32,7 +32,7 @@ jobs:
 
     steps:
       - name: repo checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: load ruby
         uses: ruby/setup-ruby@v1
@@ -97,7 +97,7 @@ jobs:
           - { os: ubuntu-latest, ruby: "3.0", openssl: openssl-head, git: 'git://git.openssl.org/openssl.git', branch: 'master', fips-enabled: true, append-configure: 'enable-fips', name-extra: 'fips' }
     steps:
       - name: repo checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: prepare openssl
         run: |