Bumps the ci group with 3 updates: [korthout/backport-action](https://github.com/korthout/backport-action), [actions/upload-artifact](https://github.com/actions/upload-artifact) and [sigstore/cosign-installer](https://github.com/sigstore/cosign-installer).

Updates `korthout/backport-action` from 2.2.0 to 2.3.0
- [Release notes](https://github.com/korthout/backport-action/releases)
- [Commits](https://github.com/korthout/backport-action/compare/b982d297e31f500652b2246cf26714796312bd23...addffea45a2f0b5682f1d5ba0506f45bc18bf174)

Updates `actions/upload-artifact` from 3.1.3 to 4.0.0
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](https://github.com/actions/upload-artifact/compare/a8a3f3ad30e3422c9c7b888a15615d19a852ae32...c7d193f32edcb7bfad88892161225aeda64e9392)

Updates `sigstore/cosign-installer` from 3.2.0 to 3.3.0
- [Release notes](https://github.com/sigstore/cosign-installer/releases)
- [Commits](https://github.com/sigstore/cosign-installer/compare/1fc5bd396d372bee37d608f955b336615edf79c8...9614fae9e5c5eddabb09f90a270fcb487c9f7149

)

---
updated-dependencies:
- dependency-name: korthout/backport-action
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: ci
- dependency-name: actions/upload-artifact
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: ci
- dependency-name: sigstore/cosign-installer
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: ci
...

Signed-off-by: dependabot[bot] <support@github.com>
(cherry picked from commit 4f20be42)