change i3 volume on default

config/i3/config

@@ -37,11 +37,11 @@ bindsym $mod+Shift+q kill
 
 # Pulse Audio controls
 # increase sound volume
-bindsym XF86AudioRaiseVolume exec --no-startup-id pactl set-sink-volume 0 +1%
+bindsym XF86AudioRaiseVolume exec --no-startup-id pactl set-sink-volume @DEFAULT_SINK@ +1%
 # decrease sound volume
-bindsym XF86AudioLowerVolume exec --no-startup-id pactl set-sink-volume 0 -1%
+bindsym XF86AudioLowerVolume exec --no-startup-id pactl set-sink-volume @DEFAULT_SINK@ -1%
 # mute sound
-bindsym XF86AudioMute exec --no-startup-id pactl set-sink-mute 0 toggle
+bindsym XF86AudioMute exec --no-startup-id pactl set-sink-mute @DEFAULT_SINK@ toggle
 
 # start dmenu (a program launcher)
 #bindsym $mod+d exec dmenu_run