Update README.md

Author: myon-bioinformatics

README.md

@@ -3,7 +3,7 @@ Use nmap library in GUI and Python(You must install "PySimpleGUI" and "python3-n
 
 ![GUI_IMAGE](GUI_IMAGE.webp)
 
-[info]When you use python-nmap3, you must install nmap at any OS.  
+[info]When you use python-nmap3, you must install nmap at any OS in advance.  
 [info] Some functions(udp_scan, os_detection,subnet_scan) must run with root privilege at the same case of the Nmap.
 
 #PySimpleGUI Reference: https://github.com/PySimpleGUI/PySimpleGUI