Update cloud-authentication.adoc Okta discovery URL (#554)

* Update cloud-authentication.adoc Okta discovery URL

Changed Okta discovery URL to authorization server details that supports groups inclusion in scope.

* added okta auth server link

Author: trevpanda

modules/security/pages/cloud-authentication.adoc

@@ -37,11 +37,11 @@ To integrate with Okta, follow the https://help.okta.com/en-us/Content/Topics/Ap
 https://auth.prd.cloud.redpanda.com/login/callback
 ```
 
-Okta provides the following fields required for SSO configuration on the Redpanda *Users* page: `clientId`, `clientSecret`, and `discoveryUrl`. The discovery URL for Okta generally looks like the following (where `an_id` could be “default”):
+Okta provides the following fields required for SSO configuration on the Redpanda *Users* page: `clientId`, `clientSecret`, and `discoveryUrl`. The discovery URL for Okta depends on the https://help.okta.com/oie/en-us/content/topics/security/api-build-oauth-servers.htm[Authorization server] details:
 
 [pass]
 ```
-https://<orgname>.okta.com/oauth2/<an_id>/.well-known/openid-configuration
+https://<orgname>.okta.com/.well-known/openid-configuration
 ``` 
 
 ==== Integrate with Microsoft Entra ID