libgnt/libgnt

Move to using a gi-docgen release rather than git

14 months ago, Gary Kramlich
c037bea489ec
Move to using a gi-docgen release rather than git

Testing Done:
purged the subprojects directory and successfully built withe docs.

Reviewed at https://reviews.imfreedom.org/r/2259/
// SPDX-FileCopyrightText: 2021 GNOME Foundation
// SPDX-License-Identifier: LGPL-2.1-or-later
// A map between namespaces and base URLs for their online documentation
baseURLs = [
[ 'GLib', 'https://docs.gtk.org/glib/' ],
[ 'GObject', 'https://docs.gtk.org/gobject/' ],
]