DOC-1452 SR UI supported in Serverless (#329)

Author: micheleRP

modules/get-started/pages/cluster-types/serverless.adoc

@@ -90,7 +90,6 @@ NOTE: Redpanda Serverless is opinionated about Kafka configurations. For example
 Not all features included in BYOC clusters are available in Serverless. For example, the following features are not supported:
 
 * HTTP Proxy API
-* Schema Registry UI (API is supported)
 * Ability to export metrics to a third-party monitoring system
 * Kafka Connect 
 * Private networking (VPC peering or AWS PrivateLink)

modules/get-started/pages/whats-new-cloud.adoc

@@ -9,6 +9,10 @@ This page lists new features added to Redpanda Cloud.
 
 == June 2025
 
+=== Schema Registry UI for Serverless
+
+The xref:manage:schema-reg/schema-reg-ui.adoc[Schema Registry UI] is now available for Serverless clusters. 
+
 === Amazon VPC Transit Gateway
 
 For BYOC and BYOVPC clusters on AWS, you can set up an xref:networking:byoc/aws/transit-gateway.adoc[Amazon VPC Transit Gateway] to connect VPCs to Redpanda services while maintaining control over network traffic.