set waybar type to simple

Droidnix/generated/system/core/waybar.nix

@@ -15,6 +15,7 @@ in
     wantedBy = [ "graphical-session.target" ];
     after = [ "graphical-session.target" ];
     serviceConfig = {
+      Type = "simple";
       ExecStart = "${config.programs.waybar.package}/bin/waybar -c ${waybar-config} -s ${waybar-style}";
       Restart = "on-failure";
       RestartSec = "5s";