build(deps): bump the ci group with 3 updates

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](b982d297e3...addffea45a)

Updates `actions/upload-artifact` from 3.1.3 to 4.0.0
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](a8a3f3ad30...c7d193f32e)

Updates `sigstore/cosign-installer` from 3.2.0 to 3.3.0
- [Release notes](https://github.com/sigstore/cosign-installer/releases)
- [Commits](1fc5bd396d...9614fae9e5)

---
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>

.github/workflows/backport.yaml

@@ -17,7 +17,7 @@ jobs:
         with:
           ref: ${{ github.event.pull_request.head.sha }}
       - name: Create backport PRs
-        uses: korthout/backport-action@b982d297e31f500652b2246cf26714796312bd23 # v2.2.0
+        uses: korthout/backport-action@addffea45a2f0b5682f1d5ba0506f45bc18bf174 # v2.3.0
         # xref: https://github.com/korthout/backport-action#inputs
         with:
           # Use token to allow workflows to be triggered for the created PR