Bump sigstore/cosign-installer from 3.8.1 to 3.9.0

Bumps [sigstore/cosign-installer](https://github.com/sigstore/cosign-installer) from 3.8.1 to 3.9.0.
- [Release notes](https://github.com/sigstore/cosign-installer/releases)
- [Commits](sigstore/cosign-installer@v3.8.1...v3.9.0)

---
updated-dependencies:
- dependency-name: sigstore/cosign-installer
  dependency-version: 3.9.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

.github/workflows/publish.yaml

@@ -39,7 +39,7 @@ jobs:
         # Install the cosign tool except on PR
         # https://github.com/sigstore/cosign-installer
         - name: Install cosign
-          uses: sigstore/cosign-installer@v3.8.1
+          uses: sigstore/cosign-installer@v3.9.0
           with:
             cosign-release: 'v2.4.3'