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](actions/checkout@v2...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/weekly_crlftolf.yaml

@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest # Use a Linux runner
     steps:
       - name: Checkout repository contents
-        uses: actions/checkout@v2 # Use the checkout action
+        uses: actions/checkout@v4 # Use the checkout action
       - name: Find files with CRLF endings
         uses: erclu/[email protected] # Use the check-crlf action
         id: check-crlf # Assign an id to this step