Update README.md

Author: raghavs046

Client-Side Components/UI Scripts/Prevent right click on portals/README.md

@@ -7,3 +7,7 @@ Go to your portal and try to roght click, it will prevent and show the alert mes
 **Use Case**
 1. Many high security organizations like banks do not want their images or links to be copied through "inspect" so right-click need to be disabled.
 2. Many organizations want their source code to be hidden so they prevent right-click.
+
+
+ **Note**
+  1. This UI script is applied through portal theme , so it will be specific to portals using that theme. It will not have instance wide affect.