chore(deps): update sigstore/cosign-installer action to v3.9.1 (#4308)

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

Author: renovate[bot]

.github/workflows/release.yml

@@ -38,7 +38,7 @@ jobs:
         with:
           go-version: "1.24"
       - name: Cosign install
-        uses: sigstore/cosign-installer@3454372f43399081ed03b604cb2d021dabca52bb # v3.8.2
+        uses: sigstore/cosign-installer@398d4b0eeef1380460a10c8013a76f728fb906ac # v3.9.1
       - name: Install UPX
         run: |
           sudo apt-get update