Bump actions/checkout from 2 to 4

Bumps [actions/checkout](https://github.com/actions/checkout) from 2 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/v2...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/03-steps.yml

@@ -50,11 +50,11 @@ jobs:
         shell: perl {0}    
       # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
       # Reference a specific commit
-      - uses: actions/checkout@a81bbbf8298c0fa03ea29cdc473d45769f953675
+      - uses: actions/checkout@ee0669bd1cc54295c223e0bb666b733df41de1c5
       # Reference the major version of a release
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       # Reference a specific version
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       # Reference a branch
       - uses: actions/checkout@main