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/merge-dependabot.yml

@@ -18,7 +18,7 @@ jobs:
       github.actor == 'dependabot[bot]'
     steps:
       - name: "Merge pull request"
-        uses: "actions/github-script@v7"
+        uses: "actions/github-script@v8"
         with:
           github-token: "${{ secrets.GITHUB_TOKEN }}"
           script: |