Add Ruby 3.1.2, 3.0.4, 2.7.6, 2.6.10

- https://www.ruby-lang.org/en/news/2022/04/12/ruby-3-1-2-released/
- https://www.ruby-lang.org/en/news/2022/04/12/ruby-3-0-4-released/
- https://www.ruby-lang.org/en/news/2022/04/12/ruby-2-7-6-released/
- https://www.ruby-lang.org/en/news/2022/04/12/ruby-2-6-10-released/