chore(deps): update sigstore/cosign-installer action to v3.8.1 (#4021)

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@dc72c7d5c4d10cd6bcb8cf6e3fd625a9e5e537da # v3.7.0
+        uses: sigstore/cosign-installer@d7d6bc7722e3daa8354c50bcb52f4837da5e9b6a # v3.8.1
       - name: Install UPX
         run: |
           sudo apt-get update