Ruby 3.1 change proposal

Hi, I have just put together Ruby 3.1 change proposal [1] and flipped it ready for package wrangler. There is nothing exceptional comparing to previous changes and there is the feedback period for change proposal reviews. Nonetheless, please review the proposal and let me know should you have any concern. Hopefully, we will be able to start with the rebuild right after the Christmas. Vít [1] https://fedoraproject.org/wiki/Changes/Ruby_3.1