lang/ruby31: Update to 3.1.2

ReleaseNotes: https://www.ruby-lang.org/en/news/2022/04/12/ruby-3-1-2-released/
PR: 263253
Approved by: sunpoet (ruby@)
MFH: 2022Q2
Security: f22144d7-bad1-11ec-9cfe-0800270512f4
Security: 06ed6a49-bad4-11ec-9cfe-0800270512f4