x11-toolkits/rubygem-uh: Update to 2.1.1

Linker error with `-fno-common' flag, fixed upstream by author, who is also the maintainer of the port.

PR: 249934
Submitted by: Thibault Jouan <tj+freebsd_ports@a13.fr> (maintainer)
Approved by: tcberner (mentor)
Relnotes: https://rubygems.org/gems/uh
Differential Revision: https://reviews.freebsd.org/D26566