chore(deps): update sigstore/cosign-installer action to v4

Author: renovate[bot]

.github/workflows/ci.yml

@@ -71,7 +71,7 @@ jobs:
       - name: Install syft
         uses: anchore/sbom-action/download-syft@v0
       - name: Setup Cosign CLI
-        uses: sigstore/cosign-installer@v3
+        uses: sigstore/cosign-installer@v4.1.2
       - name: Install goreleaser
         run: |
           echo 'deb [trusted=yes] https://repo.goreleaser.com/apt/ /' | sudo tee /etc/apt/sources.list.d/goreleaser.list