Update the links for the groupme protocol to the active repository

Testing Done:
Ran the devserver and verified everything looked okay.

Reviewed at
title: "libgnt 2.14.1 Released"
date: 2021-02-04T22:55:01-06:00
Today we released a minor version of libgnt, version 2.14.1. This release bumps
the minimum required meson version from 0.37.0 to 0.41.0 and fixes an issue
where a string could have been truncated.
You can find the released files on
[SourceForge]( and
the official ChangeLog over