Bump actions/github-script from 3 to 6 (#12674)

Bumps [actions/github-script](https://github.com/actions/github-script) from 3 to 6.
- [Release notes](https://github.com/actions/github-script/releases)
- [Commits](https://github.com/actions/github-script/compare/v3...v6)

---
updated-dependencies:
- dependency-name: actions/github-script
  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>

.github/workflows/ghcr_cleanup.yml

@@ -12,7 +12,7 @@ jobs:
 
     steps:
       - name: Delete untagged images
-        uses: actions/github-script@v3
+        uses: actions/github-script@v6
         with:
           github-token: ${{ secrets.CR_PAT }}
           script: |