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](https://github.com/actions/checkout/compare/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>

.github/workflows/tests.yaml

@@ -4,7 +4,7 @@ jobs:
   unit-tests:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Setup
         uses: actions/setup-python@v4
         with:
@@ -43,7 +43,7 @@ jobs:
         run: |
           GHCR_REPOSITORY="${{ github.repository_owner }}"
           echo "REPOSITORY=${GHCR_REPOSITORY,,}" >> ${GITHUB_ENV}
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name : Login to GHCR
         uses : docker/login-action@v2.2.0
         with :

.github/workflows/update-task-in-docker-images.yml

@@ -31,7 +31,7 @@ jobs:
           echo "REPOSITORY=${GHCR_REPOSITORY,,}" >> ${GITHUB_ENV}
 
       - name: Checkout repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Install cosign
         uses: sigstore/cosign-installer@v3.1.1

.github/workflows/update-timew-in-docker-images.yml

@@ -31,7 +31,7 @@ jobs:
           echo "REPOSITORY=${GHCR_REPOSITORY,,}" >> ${GITHUB_ENV}
 
       - name: Checkout repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Install cosign
         uses: sigstore/cosign-installer@v3.1.1