relative links

Author: paulohtb6

modules/get-started/pages/release-notes/redpanda.adoc

@@ -1,6 +1,7 @@
 = What's New in Redpanda
 :description: Summary of new features and updates in this Redpanda release.
 :page-aliases: get-started:whats-new-233.adoc, get-started:whats-new-241.adoc, get-started:whats-new.adoc
+:page-http-proxy-whats-new:
 
 This topic includes new content added in version {page-component-version}. For a complete list of all product updates, see the https://github.com/redpanda-data/redpanda/releases/[Redpanda release notes^]. See also:
 

modules/manage/pages/security/authentication.adoc

@@ -4,6 +4,7 @@
 :page-aliases: security:authentication.adoc
 :page-toclevels: 3
 :page-categories: Management, Security
+:page-http-proxy-auth:
 
 include::manage:partial$authentication.adoc[]
 

modules/shared/partials/http-proxy-ephemeral-credentials-breaking-change.adoc

@@ -1,5 +1,13 @@
 *Breaking change in Redpanda 25.2:* Ephemeral credentials for HTTP Proxy are removed. If your HTTP Proxy API listeners use `authentication_method: none`, you must configure explicit SASL credentials (xref:reference:properties/broker-properties.adoc#scram_username[`scram_username`], xref:reference:properties/broker-properties.adoc#scram_password[`scram_password`], and xref:reference:properties/broker-properties.adoc#sasl_mechanism[`sasl_mechanism`]) for HTTP Proxy to authenticate with the Kafka API. Without these credentials, HTTP Proxy will attempt unauthenticated connections to the Kafka API. 
 
-Redpanda Data recommends enabling authentication on both HTTP Proxy and the Kafka API. 
+Redpanda Data recommends enabling authentication on both HTTP Proxy and the Kafka API.
 
+ifndef::page-http-proxy-auth[]
 For configuration instructions, see xref:manage:security/authentication.adoc#schema-and-http-to-redpanda[Configure HTTP Proxy to connect to Redpanda with SASL].
+endif::[]
+
+ifdef::page-http-proxy-auth[]
+ifndef::page-http-proxy-whats-new[]
+For details about this breaking change, see xref:get-started:release-notes/redpanda.adoc#http-proxy-authentication-changes[HTTP Proxy authentication changes].
+endif::[]
+endif::[]