Bump actions/github-script from 7 to 8

Bumps [actions/github-script](https://github.com/actions/github-script) from 7 to 8.
- [Release notes](https://github.com/actions/github-script/releases)
- [Commits](actions/github-script@v7...v8)

---
updated-dependencies:
- dependency-name: actions/github-script
  dependency-version: '8'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/auto-merge-on-demand.yml

@@ -30,7 +30,7 @@ jobs:
       - id: get-pr-numbers
         if: inputs.pr-number == '0'
         name: Get all open PRs
-        uses: actions/github-script@v7
+        uses: actions/github-script@v8
         with:
           # !FIXME: this is not working if there is more than 100 PRs opened
           script: |