Bump actions/github-script from 6 to 7

Bumps [actions/github-script](https://github.com/actions/github-script) from 6 to 7.
- [Release notes](https://github.com/actions/github-script/releases)
- [Commits](https://github.com/actions/github-script/compare/v6...v7)

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

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/cleanup.yml

@@ -21,7 +21,7 @@ jobs:
     steps:
       -
         name: Delete branch
-        uses: actions/github-script@v6
+        uses: actions/github-script@v7
         with:
           script: |
             await github.rest.git.deleteRef({