[rhythmbox] Fix broken help link

[Jeremy Bicha <jbicha src gnome org>]

commit 99888a5a71632ec5e1f157ac10c144c5effbec62
Author: Jeremy Bicha <jbicha ubuntu com>
Date:   Sun Apr 7 23:56:50 2013 -0400

    Fix broken help link
    
    This regression appeared with the GMenu conversion
    
    https://bugzilla.gnome.org/show_bug.cgi?id=697526

 shell/rb-application.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/shell/rb-application.c b/shell/rb-application.c
index 298f044..d033675 100644
--- a/shell/rb-application.c
+++ b/shell/rb-application.c
@@ -264,7 +264,7 @@ help_action_cb (GSimpleAction *action, GVariant *parameters, gpointer user_data)
        g_object_get (app->priv->shell, "window", &window, NULL);
 
        gtk_show_uri (gtk_widget_get_screen (GTK_WIDGET (window)),
-                     "ghelp:rhythmbox",
+                     "help:rhythmbox",
                      gtk_get_current_event_time (),
                      &error);