Test old version

Author: sebastianrakel

.github/workflows/tests.yaml

@@ -45,7 +45,7 @@ jobs:
           - {os: ubuntu-24.04, ruby: '3.2'} # openssl 3
           - {os: ubuntu-24.04, ruby: '3.3'} # openssl 3
           - {os: ubuntu-24.04, ruby: '3.4'} # openssl 3
-          - {os: ubuntu-24.04, ruby: 'jruby-9.4'}
+          - {os: ubuntu-24.04, ruby: 'jruby-9.4.8.0'}
           - {os: windows-2025, ruby: '3.1'}
           - {os: windows-2025, ruby: '3.2'} # openssl 3
           - {os: windows-2025, ruby: '3.3'} # openssl 3