Add jruby-9.4.14.0 to CI matrix

Release Announcement: https://groups.google.com/a/g.ruby-lang.org/g/jruby/c/vxl8abHL5is/m/RqK1kfVBAwAJ.

Author: bastelfreak

.github/workflows/tests.yaml

@@ -48,6 +48,7 @@ jobs:
           - {os: ubuntu-24.04, ruby: 'jruby-9.4'}
           - {os: ubuntu-24.04, ruby: 'jruby-9.4.8.0'}
           - {os: ubuntu-24.04, ruby: 'jruby-9.4.13.0'}
+          - {os: ubuntu-24.04, ruby: 'jruby-9.4.14.0'}
           - {os: windows-2025, ruby: '3.2'}
           - {os: windows-2025, ruby: '3.3'}
           - {os: windows-2025, ruby: '3.4'}