Merge pull request #272609 from JnHs/jh-arck8-1153

adding 1.15.3

Author: prmerger-automator[bot]

articles/azure-arc/kubernetes/release-notes.md

@@ -1,6 +1,6 @@
 ---
 title: "What's new with Azure Arc-enabled Kubernetes"
-ms.date: 12/19/2023
+ms.date: 04/18/2024
 ms.topic: overview
 description: "Learn about the latest releases of Arc-enabled Kubernetes."
 ---
@@ -13,6 +13,10 @@ When any of the Arc-enabled Kubernetes agents are updated, all of the agents in
 
 We generally recommend using the most recent versions of the agents. The [version support policy](agent-upgrade.md#version-support-policy) covers the most recent version and the two previous versions (N-2).
 
+## Version 1.15.3 (March 2023)
+
+- Various enhancements and bug fixes
+
 ## Version 1.14.5 (December 2023)
 
 - Migrated auto-upgrade to use latest Helm release