Update README.md

Author: baponkar

README.md

@@ -3,3 +3,6 @@
 This Script using zenity gui.If Your's linux system has not zenity package then first you should need to install this by using
 `sudo apt-get install zenity`
 then this script works properly by `./gui_update_1.sh`.
+
+In new update of gui_update_1.sh file having security check option for your machine with rkhunter package.So you need to download this package also
+`sudo apt install rkhunter -y`