Fix mute/flip command

dotfiles/i3/config

 
 bindsym XF86AudioRaiseVolume exec "saturnin au up"
 bindsym XF86AudioLowerVolume exec "saturnin au down"
-bindsym XF86AudioMute        exec "saturnin au m"
+bindsym XF86AudioMute        exec "saturnin au flip"
 
 mouse_warping none