Bump sigstore/cosign-installer from 3.9.0 to 3.9.1 (#5971)

Bumps [sigstore/cosign-installer](https://github.com/sigstore/cosign-installer) from 3.9.0 to 3.9.1.
- [Release notes](https://github.com/sigstore/cosign-installer/releases)
- [Commits](https://github.com/sigstore/cosign-installer/compare/v3.9.0...v3.9.1)

---
updated-dependencies:
- dependency-name: sigstore/cosign-installer
  dependency-version: 3.9.1
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/builder.yml

@@ -131,7 +131,7 @@ jobs:
 
       - name: Install Cosign
         if: needs.init.outputs.publish == 'true'
-        uses: sigstore/cosign-installer@v3.9.0
+        uses: sigstore/cosign-installer@v3.9.1
         with:
           cosign-release: "v2.4.3"
 

.github/workflows/ci.yaml

@@ -299,7 +299,7 @@ jobs:
         with:
           python-version: ${{ needs.prepare.outputs.python-version }}
       - name: Install Cosign
-        uses: sigstore/cosign-installer@v3.9.0
+        uses: sigstore/cosign-installer@v3.9.1
         with:
           cosign-release: "v2.4.3"
       - name: Restore Python virtual environment