fix: correct cosign-installer SHA for v3

The previous SHA was invalid, causing 'action could not be found' error.
Using the correct commit SHA for sigstore/cosign-installer v3.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: jongio

.github/workflows/release.yml

@@ -496,7 +496,7 @@ jobs:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Install cosign
-        uses: sigstore/cosign-installer@3454372be43e8ddeec39df0f73bb47954da3a1f1 # v3
+        uses: sigstore/cosign-installer@398d4b0eeef1380460a10c8013a76f728fb906ac # v3
 
       - name: Install syft
         uses: anchore/sbom-action/download-syft@57aae528053a48a3f6235f2d9461b05fbcb7366d # v0