Bump actions/checkout from 3.0.2 to 3.3.0 (#70)

Bumps [actions/checkout](https://github.com/actions/checkout) from 3.0.2 to 3.3.0.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@2541b12...ac59398)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/ci.yml

@@ -14,7 +14,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout code
-        uses: actions/checkout@2541b1294d2704b0964813337f33b291d3f8596b # 2.3.5
+        uses: actions/checkout@ac593985615ec2ede58e132d2e21d2b1cbd6127c # 2.3.5
 
       - name: Run Tests in Docker
         run: bin/run-tests-in-docker.sh