[DOCS] Prebuilt rules prerequisites: Add new section to What's New in 8.3

docs/whats-new.asciidoc

@@ -82,7 +82,7 @@ image::whats-new/images/8.3/user-auth.png[]
 
 *{ml-cap} rules upgraded to v3 {ml} jobs*
 
-Elastic prebuilt rules for some Windows and Linux anomalies have been updated with new v3 {ml}} jobs. Refer to our {security-guide}/alerts-ui-monitor.html#ml-job-compatibility[documentation] for information about how to upgrade and/or continue to use the old v1/v2 jobs.
+Elastic prebuilt rules for some Windows and Linux anomalies have been updated with new v3 {ml} jobs. Refer to our {security-guide}/alerts-ui-monitor.html#ml-job-compatibility[documentation] for information about how to upgrade and/or continue to use the old v1/v2 jobs.
 
 *New Actions column in rule execution logs table enables filtering*
 
@@ -95,6 +95,15 @@ image::whats-new/images/8.3/actions-icon.png[]
 
 15 new {security-guide}/prebuilt-rules.html[prebuilt rules] were added in 8.3.0.
 
+*Prerequisites and setup guides for Elastic prebuilt rules*
+
+Elastic prebuilt rules now provide additional information to help you identify and meet their {security-guide}/rules-ui-management.html#rule-prerequisites[prerequisites]. You can confirm these requirements in the *Related integrations* and *Required fields* sections of a rule's details page, and consult its *Setup guide* for additional guidance.
+
+[role="screenshot"]
+image::whats-new/images/8.3/rule-details-prerequisites.png[Rule details page with Related integrations, Required fields, and Setup guide highlighted]
+
+NOTE: Content for these new sections is delivered in a prebuilt rules update, independent of {stack} release versioning.
+
 [discrete]
 == OAuth support in {sn} connectors