Update permission needed for API calls in ServiceNow (demisto#33947)

* Update permission needed for API calls in  ServiceNow

Ability to call web services in ServiceNow is granted by role snc_platform_rest_api_access.

* Update README.md

Packs/ServiceNow/Integrations/ServiceNowv2/README.md

@@ -15,8 +15,8 @@ This integration was integrated and tested with the Orlando version of ServiceNo
 3. Get, update, create, delete records from any ServiceNow table.
 
 ## Required Permissions
-To use ServiceNow on Cortex XSOAR, ensure your user account has the *rest_api_explorer* and *web_service_admin* roles.
- These roles are required to make API calls.
+To use ServiceNow on Cortex XSOAR, ensure your user account has the *snc_platform_rest_api_access* role.
+ This role is required to make API calls.
  Also add to your user account the specific tables that you want to have access to.
  However, these permissions may not suffice for managing records in some tables. Make sure you have the correct role so you have permissions to work with the relevant table.