Fix zypp release

Author: pavinjosdev

zypperoni

@@ -155,7 +155,7 @@ def get_zypp_lock():
 
 # Function to release lock on zypper
 def release_zypp_lock():
-    if os.getuid == 0:
+    if os.getuid() == 0:
         os.system(f"echo -n > {ZYPPER_PID_FILE}")
         return True
     else: