Fix a string which shouldn't have been static

Closes #3

src/rugby-application.c

@@ -25,7 +25,7 @@ about_activated (GSimpleAction *simple,
     GtkApplication *app = GTK_APPLICATION (user_data);
     GtkWindow *window = gtk_application_get_active_window (app);
 
-    static const gchar *authors[] = { "Bruce Cowan", NULL };
+    const gchar *authors[] = { "Bruce Cowan", NULL };
     g_autoptr (GDateTime) date = g_date_time_new_now_local ();
     gint year = g_date_time_get_year (date);
     g_autofree gchar *copyright = g_strdup_printf ("Copyright © 2012–%d Bruce Cowan",