Add mumble shortcut

Install/Templates/config/i3/config

@@ -210,6 +210,7 @@ bindsym $mod+Ctrl+t exec thunderbird
 bindsym $mod+Ctrl+g exec gimp
 bindsym $mod+Ctrl+k exec keepassxc
 bindsym $mod+Ctrl+a exec atril
+bindsym $mod+Ctrl+m exec mumble
 
 # resize window (you can also use the mouse for that)
 mode "resize" {