Update What's New in 5.6

docs/modules/ROOT/pages/whats-new.adoc

@@ -28,9 +28,9 @@ Below are the highlights of the release.
 
 * OAuth 2.0 Client
 
-** Improved https://github.com/spring-projects/spring-security/pull/9791[client credentials] encoding
-** Improved https://github.com/spring-projects/spring-security/pull/9779[access token response] parsing
-** Added https://github.com/spring-projects/spring-security/pull/10155[custom grant types support] for authorization requests
+** Improved https://github.com/spring-projects/spring-security/pull/9791[Client Credentials encoding]
+** Improved https://github.com/spring-projects/spring-security/pull/9779[Access Token Response parsing]
+** Added https://github.com/spring-projects/spring-security/pull/10155[custom grant types support] for Authorization Requests
 
 * Testing
 
@@ -39,5 +39,10 @@ Below are the highlights of the release.
 [[whats-new-webflux]]
 === WebFlux
 
-** Improved https://github.com/spring-projects/spring-security/pull/9791[client credentials] encoding
-** Added https://github.com/spring-projects/spring-security/pull/10131[custom headers support] for access token requests
+* OAuth 2.0 Client
+
+** Improved https://github.com/spring-projects/spring-security/pull/9791[Client Credentials encoding]
+** Added https://github.com/spring-projects/spring-security/pull/10131[custom headers support] for Access Token Requests
+** Added https://github.com/spring-projects/spring-security/pull/10269[custom response parsing] for Access Token Requests
+** Added https://github.com/spring-projects/spring-security/pull/10327[jwt-bearer Grant Type support] for Access Token Requests
+** Added https://github.com/spring-projects/spring-security/pull/10336[JWT Client Authentication support] for Access Token Requests