Enable Packit CI for rpms/ruby

Author: voxik

secrets/packit/prod/packit-service.yaml.j2

@@ -458,6 +458,7 @@ enabled_projects_for_fedora_ci:
   - https://src.fedoraproject.org/rpms/qbittorrent
   - https://src.fedoraproject.org/rpms/redhat-rpm-config
   - https://src.fedoraproject.org/rpms/rpmlint
+  - https://src.fedoraproject.org/rpms/ruby
   - https://src.fedoraproject.org/rpms/rust-atomic_refcell
   - https://src.fedoraproject.org/rpms/rust-config-file
   - https://src.fedoraproject.org/rpms/rust-python-launcher