Revisit Saml2Logout Docs

Issue gh-14944

docs/modules/ROOT/pages/servlet/authorization/index.adoc

@@ -8,6 +8,7 @@ The advanced authorization capabilities within Spring Security represent one of
 Irrespective of how you choose to authenticate (whether using a Spring Security-provided mechanism and provider or integrating with a container or other non-Spring Security authentication authority), the authorization services can be used within your application in a consistent and simple way.
 
 You should consider attaching authorization rules to xref:servlet/authorization/authorize-http-requests.adoc[request URIs] and xref:servlet/authorization/method-security.adoc[methods] to begin.
+In either case, you can listen and react to xref:servlet/authorization/events.adoc[authorization events] that each authorization check publishes.
 Below there is also wealth of detail about xref:servlet/authorization/architecture.adoc[how Spring Security authorization works] and how, having established a basic model, it can be fine-tuned.