Bump actions/checkout from 3 to 4 (#17)

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

.github/workflows/create-v1.0-pull-request.yml

@@ -27,7 +27,7 @@ jobs:
     # Steps represent a sequence of tasks that will be executed as part of the job
     steps:
     # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
 
     # Create a pull request [1]
     - name: Create PR using the GitHub REST API via hub

.github/workflows/docker-publish.yml

@@ -26,7 +26,7 @@ jobs:
           PACKAGE_VERSION=$(echo $PACKAGE_VERSION | sed s/^v//)
           echo "::set-output name=version::$PACKAGE_VERSION"
       - name: Check out the repo
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           submodules: true
           ref: ${{github.event.inputs.tag || ''}}