Bump actions/checkout from 3 to 4 (#77)

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

Author: dependabot[bot]

.github/workflows/pre-main.yml

@@ -72,7 +72,7 @@ jobs:
       # Clone all of the repos needed.
       # We need the crd-operator-scaling, cnf-certification-test, and cnf-certification-test-partner repos.
       - name: Check out crd-operator-scaling code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           ref: ${{ github.sha }}
 
@@ -81,7 +81,7 @@ jobs:
         run: make docker-build IMG=${OPERATOR_IMAGE_NAME}:${OPERATOR_LOCAL_TEST_IMAGE_TAG}
 
       - name: Check out `cnf-certification-test-partner`
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           repository: test-network-function/cnf-certification-test-partner
           path: cnf-certification-test-partner
@@ -118,7 +118,7 @@ jobs:
 
       # Run the cnf-certification-test repo as a container
       - name: Check out `cnf-certification-test`
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           repository: test-network-function/cnf-certification-test
           path: cnf-certification-test

.github/workflows/release.yml

@@ -31,7 +31,7 @@ jobs:
 
       # Clone the operator repo.
       - name: Check out crd-operator-scaling code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           ref: ${{ github.ref_name }}