wephyr script should also use $OUTPUTS under Wayland

This script can create multiple windows, one per "output", the number of
which is specified by $WLR_X11_OUTPUTS in the environment, under X.
Under Wayland, it reads $WLR_WL_OUTPUTS so let's use that as well.

scripts/wephyr

@@ -42,6 +42,7 @@ else:
 
 os.environ["QTILE_XEPHYR"] = "2"
 os.environ["WLR_X11_OUTPUTS"] = str(outputs)
+os.environ["WLR_WL_OUTPUTS"] = str(outputs)
 
 proc = subprocess.Popen(cmd)