ci: bump actions/github-script from 7 to 9

Bumps [actions/github-script](https://github.com/actions/github-script) from 7 to 9.
- [Release notes](https://github.com/actions/github-script/releases)
- [Commits](actions/github-script@v7...v9)

---
updated-dependencies:
- dependency-name: actions/github-script
  dependency-version: '9'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/preview.yml

@@ -31,7 +31,7 @@ jobs:
           SURGE_TOKEN: ${{ secrets.SURGE_TOKEN }}
         run: surge ./output petrsvihlik-pr-${{ github.event.pull_request.number }}.surge.sh
       - name: Post preview URL comment
-        uses: actions/github-script@v7
+        uses: actions/github-script@v9
         with:
           script: |
             const url = 'https://petrsvihlik-pr-${{ github.event.pull_request.number }}.surge.sh';