www/ruby-pygments.rb: update to 2.3.1

2.3.1 (2022-12-04)

Summary

This release fixes "Broken pipe error in Mentos" caused by inability
pygments.rb to find Python executable in certain environments

Distribution

* RubyGem (pygments.rb)

Release meta

Released on: 2022-12-04
Released by: @slonopotamus

(taca)