herbstluftwm: update panel to use pipewire instead of pulseaudio

.config/herbstluftwm/panel/panel.sh

@@ -61,10 +61,10 @@ fi
 
 # get the current pulseaudio volume, or state incase muted
 pulsegetvol() {
-    if [ $(pulsemixer --get-mute) == 1 ]; then
+    if [ $(pamixer --get-mute) == 1 ]; then
         echo -ne "^fg($foreground)muted\n"
     else
-        volume=$(pulsemixer --get-volume | awk '{print $1; exit}')
+		volume=$(pamixer --get-volume-human)
         echo -n "^fg($foreground)$volume"
     fi
 }