Bump actions/checkout from 4.2.2 to 5.0.0

Bumps [actions/checkout](https://github.com/actions/checkout) from 4.2.2 to 5.0.0.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v4.2.2...v5.0.0)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: 5.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/update-readme.yml

@@ -10,7 +10,7 @@ jobs:
   markscribe:
     runs-on: ubuntu-24.04
     steps:
-      - uses: actions/checkout@v4.2.2
+      - uses: actions/checkout@v5.0.0
 
       - uses: muesli/readme-scribe@master
         #env: