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](actions/github-script@v6...v7)

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

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

.github/workflows/cd.yml

@@ -380,7 +380,7 @@ jobs:
 
       - name: Comment on PR with Job Status and delete the test branch
         if: ${{ steps.staging-deploy-status.outputs.status }} == 'completed'
-        uses: actions/github-script@v6
+        uses: actions/github-script@v7
         with:
           github-token: ${{ secrets.jupyterhub_bot_pat }}
           script: |