Update note as to why we use tty1 in desktop_notifications

It's been on 1 so long now I kinda don't want to change it to 3
or 4 or anything. That might break something. As long as it's not
causing any trouble let's just leave it on 1.

Signed-off-by: Adam Williamson <awilliam@redhat.com>

tests/desktop_notifications.pm

@@ -21,7 +21,8 @@ sub run {
         do_bootloader(postinstall => 0, params => '3');
     }
     boot_to_login_screen;
-    # use tty1 to avoid RHBZ #1821499 on F32 Workstation live
+    # tty1 is used here for historic reasons, but it's not hurting
+    # anything and changing it might, so let's leave it...
     $self->root_console(tty => 1);
     # ensure we actually have some package updates available
     prepare_test_packages;