Bump actions/checkout from 3.5.3 to 4.0.0

Bumps [actions/checkout](https://github.com/actions/checkout) from 3.5.3 to 4.0.0.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v3.5.3...v4.0.0)

---
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

@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-20.04
     timeout-minutes: 20
     steps:
-    - uses: actions/checkout@v3.5.3
+    - uses: actions/checkout@v4.0.0
       with:
         fetch-depth: 1
     - uses: actions/setup-go@v4
@@ -31,7 +31,7 @@ jobs:
     - uses: actions/setup-go@v4
       with:
         go-version: 1.18.x
-    - uses: actions/checkout@v3.5.3
+    - uses: actions/checkout@v4.0.0
       with:
         fetch-depth: 1
     - name: "Run unit tests"