Added Ruby 4.0.0-preview2 to the ruby-versions database. Now ruby-install users can safely install Ruby 4.0.0-preview2.
$ ruby-install -U ruby-4.0.0-preview2
https://github.com/postmodern/ruby-install#readme
https://www.ruby-lang.org/en/news/2025/11/17/ruby-4-0-0-preview2-released/