Fix mispelling

Author: zdohnal

authconn.py

@@ -24,7 +24,7 @@
 import gi
 from gi.repository import GLib
 from gi.repository import Gdk
-gi.requires_version('Gtk', '3.0')
+gi.require_version('Gtk', '3.0')
 from gi.repository import Gtk
 import os
 from errordialogs import *