Log Message:
lang/ruby31-base: update to 3.1.1

From release announce:

Ruby 3.1.1 Released
Posted by naruse on 18 Feb 2022

Ruby 3.1.1 has been released.

This is the first TEENY version release of the stable 3.1 series.

See the commit logs <https://github.com/ruby/ruby/compare/v3_1_0...v3_1_1> \ 
for details.