Bump actions/github-script from 8 to 9 (#41)

Bumps [actions/github-script](https://github.com/actions/github-script) from 8 to 9.
- [Release notes](https://github.com/actions/github-script/releases)
- [Commits](actions/github-script@v8...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>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/auto-assign-pr.yml

@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Assign PR to repo owner
-        uses: actions/github-script@v8
+        uses: actions/github-script@v9
         with:
           github-token: ${{ secrets.GH_ADMIN_TOKEN }}
           script: |

.github/workflows/cleanup-action-runs.yml

@@ -11,7 +11,7 @@ jobs:
   cleanup:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/github-script@v8
+      - uses: actions/github-script@v9
         with:
           script: |           
             const KEEP_RUNS = 10