nixos/unifi: enable sd_notify

Let's use unifi's sd_notify now that it's patched

Author: qubitnano

nixos/modules/services/networking/unifi.nix

@@ -143,7 +143,7 @@ in
       restartTriggers = [ cfg.unifiPackage cfg.mongodbPackage ];
 
       serviceConfig = {
-        Type = "simple";
+        Type = "notify";
         ExecStart = "${cmd} start";
         ExecStop = "${cmd} stop";
         Restart = "on-failure";