Improve volume icon

Install/Templates/i3/status_bar

@@ -48,8 +48,8 @@ disk "/" {
 }
 
 volume master {
-	format = "Vol : %volume"
-	format_muted = "Vol : muted (%volume)"
+	format = "♪ %volume"
+	format_muted = "♪× (%volume)"
 	device = "default"
 	mixer = "Master"
 	mixer_idx = 0