Bump actions/checkout from 2.4.2 to 3.6.0 (#345)

Bumps [actions/checkout](https://github.com/actions/checkout) from 2.4.2 to 3.6.0.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](https://github.com/actions/checkout/compare/v2.4.2...v3.6.0)

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

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

.github/workflows/unit_tests.yaml

@@ -5,7 +5,7 @@ jobs:
     name: test
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@61b9e3751b92087fd0b06925ba6dd6314e06f089
+    - uses: actions/checkout@v3.6.0
     - name: Setup go
       uses: actions/setup-go@fac708d6674e30b6ba41289acaab6d4b75aa0753
       with: