Bump geekyeggo/delete-artifact from 5 to 6

Bumps [geekyeggo/delete-artifact](https://github.com/geekyeggo/delete-artifact) from 5 to 6.
- [Release notes](https://github.com/geekyeggo/delete-artifact/releases)
- [Changelog](https://github.com/GeekyEggo/delete-artifact/blob/main/CHANGELOG.md)
- [Commits](GeekyEggo/delete-artifact@v5...v6)

---
updated-dependencies:
- dependency-name: geekyeggo/delete-artifact
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/stage-6-promote.yaml

@@ -110,6 +110,6 @@ jobs:
     needs: [ promote ]
     steps:
       - name: "Delete workflow artefact"
-        uses: geekyeggo/delete-artifact@v5
+        uses: geekyeggo/delete-artifact@v6
         with:
           name: release-package