This is the first release based on ruby-3.0.0: https://www.ruby-lang.org/en/news/2020/12/25/ruby-3-0-0-released/
Changes compared to RubyInstaller-2.7.2-1
Encoding.default_encoding
and filesystem encoding is now UTF-8.
The UTF-8 option is removed from the installer.
Legacy console encoding can still be set manually perRUBYOPT=-Elocale
.