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](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]>

.github/workflows/generate.yml

@@ -24,7 +24,7 @@ jobs:
 
           echo "ok=${result}" >>"$GITHUB_OUTPUT"
 
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         if: steps.is-first-week.outputs.ok
 
       - uses: ruby/setup-ruby@v1