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/ci.yaml

@@ -9,14 +9,14 @@ jobs:
     # Execute the checks inside the container instead the VM.
     container: golangci/golangci-lint:v1.54.2-alpine
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - run: ./hack/scripts/check.sh
 
   unit-test:
     name: Unit test
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: actions/setup-go@v4
         with:
           go-version-file: go.mod
@@ -30,7 +30,7 @@ jobs:
       matrix:
         kubernetes: [1.24.15, 1.25.11, 1.26.6, 1.27.3, 1.28.0]
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: actions/setup-go@v4
         with:
           go-version-file: go.mod