docs: Add customizable claim names feature

README.md

@@ -5,10 +5,11 @@ An extension to the ERPNext Social Login authentication method (OIDC) that incor
 Features:
 
 - Group to Role mapping: maps the received *groups* as token claim to ERPNext roles.
+- Customizable claim names.
 - Specify the default role for the users that haven't logged in yet.
 - Automatically creates users from trusted identity providers even if signup is disabled in the site.
 
-![image](https://github.com/MohammedNoureldin/oidc_extended/assets/14913147/162247a8-7e5a-4393-8a9c-ece78334ee33)
+![image](https://github.com/MohammedNoureldin/frappe-oidc-extended/assets/14913147/e72cd642-efb5-4aab-a954-77c3744adab4)
 
 #### License