chore(deps): update sigstore/cosign-installer action to v3.9.1 (#346)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/release.yaml

@@ -27,7 +27,7 @@ jobs:
       with:
         go-version: '1.24'
         cache: true
-    - uses: sigstore/[email protected].0         # installs cosign
+    - uses: sigstore/[email protected].1         # installs cosign
 #    - uses: anchore/sbom-action/[email protected] # installs syft
     - uses: docker/login-action@v3                   # login to ghcr
       with: