dbus: namespace reference to Notify() function

Needed so it's probably linked in hotdoc, see
https://github.com/hotdoc/hotdoc/issues/82



Signed-off-by: Guillaume Desmottes <guillaume.desmottes@collabora.co.uk>
Reviewed-by: Mathieu Duponchelle <mathieu.duponchelle@collabora.co.uk>
Differential Revision: https://phabricator.apertis.org/D5382

dbus/org.apertis.NavigationGuidance1.TurnByTurn.xml

@@ -46,7 +46,7 @@
   <!--
   CloseNotification:
   @since: 0.1612.0
-  @id: a notification ID, previously returned by Notify()
+  @id: a notification ID, previously returned by org.apertis.NavigationGuidance1.TurnByTurn.Notify()
 
   Causes a notification to be forcefully closed and removed from the user's view. It can be used, for example,
   if the navigation system detects that the current turn-by-turn notification is no longer relevant based on the