MFH: r447604

devel/rubygem-gettext: Update from 3.1.6 to 3.2.2

Changelog: https://github.com/ruby-gettext/gettext/blob/3.2.2/doc/text/news.md

Submitted by: Matthias Fechner <idefix@fechner.net>

Approved by: ports-secteam (feld)