replace networkmanager comand with systemctl for Suse

manager.py

@@ -233,7 +233,7 @@ class Detector:
 
         elif os_system == "SUSE Tumbleweed" or os_system == "SUSE Leap":
             result = subprocess.run(
-                ["zypper search --installed-only | grep NetworkManager"],
+                ["systemctl status NetworkManager"],
                 capture_output=True,
                 shell=True,
                 text=True,