Added update technique

README.md

@@ -28,10 +28,15 @@ e.g.
 Following installation using the steps detailed in the <strong>Installation section</strong>, a folder will have been created in your home directory which contains the <strong>moreinfo</strong> BASH script.  
 
 To run <strong>moreinfo</strong> script enter the following commands:  
-&nbsp;&nbsp; cd ./moreinfo  
+&nbsp;&nbsp; cd ~/moreinfo  
 Run the script :  
 &nbsp;&nbsp; sudo bash mi.sh  
 
+To update  
+&nbsp;&nbsp; cd ~/moreinfo  
+run git  
+&nbsp;&nbsp; sudo git pull  
+
 ### Typical Output
 d03114 &nbsp;Q2 2020 4 Model B &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;1.4 &nbsp;&nbsp;&nbsp;8 GB &nbsp;&nbsp;&nbsp;(Mfg by Sony)