gplugin/gplugin

Replace the ubuntu-hirsute-amd64 convey plan with a ubuntu-jammy-amd64 plan

Testing Done:
Ran the plan locally and verified that the clean plan cleaned it up.

Reviewed at https://reviews.imfreedom.org/r/1206/
// 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/' ],
[ 'GModule', 'https://docs.gtk.org/gmodule/' ],
]