Update sign-release.yml

Signed-off-by: David Osipov <[email protected]>

Author: DavidOsipov

.github/workflows/sign-release.yml

@@ -39,4 +39,4 @@ jobs:
           inputs: feldman_vss.py README.md LICENSE pyproject.toml
           verify: true
           verify-cert-identity: [email protected]
-          verify-oidc-issuer: https://oauth2.sigstage.dev/auth
+          verify-oidc-issuer: https://token.actions.githubusercontent.com