Bump actions/checkout from 5 to 6 (#6)

Bumps [actions/checkout](https://github.com/actions/checkout) from 5 to 6.
- [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/v5...v6)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

.github/workflows/update.yml

@@ -24,7 +24,7 @@ jobs:
     runs-on: "ubuntu-latest"
     timeout-minutes: 5
     steps:
-      - uses: "actions/checkout@v5"
+      - uses: "actions/checkout@v6"
       - name: "Configure Git"
         run: |
           git config user.name "Rodolfo Carvalho"