deps: 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](https://github.com/actions/github-script/compare/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] <support@github.com>

.github/workflows/auto-merge-dependencies.yml

@@ -20,7 +20,7 @@ jobs:
 
     steps:
       - name: Auto-merge Dependabot dependency PRs
-        uses: actions/github-script@v7
+        uses: actions/github-script@v8
         with:
           script: |
             const pullRequests = context.payload.workflow_run.pull_requests || [];