Wording update for release notes

Author: t-rufang

CHANGELOG.md

@@ -44,7 +44,7 @@ All notable changes to "Azure Toolkit for IntelliJ IDEA" will be documented in t
 
 ### Changed
 
-- User experiences change for HDInsight Reader role cluster
+- **Breaking change**: Users with cluster ‘**Reader**’ only role can no longer submit job to the HDInsight cluster nor access to the cluster storage. Please request the cluster owner or user access administrator to upgrade your role to **HDInsight Cluster Operator** or **Contributor** in the [Azure Portal](https://ms.portal.azure.com). Click [here](https://docs.microsoft.com/en-us/azure/role-based-access-control/built-in-roles#contributor) for more information. 
 - AadProvider.json file is no longer needed for Spark on Cosmos Serverless feature
 
 ### Fixed

PluginsAndFeatures/azure-toolkit-for-intellij/resources/META-INF/plugin.xml

@@ -30,7 +30,7 @@
     </ul>
     <h4>Changed</h4>
     <ul>
-        <li>User experiences change for HDInsight Reader role cluster</li>
+        <li><span style="color: red;font-weight: bold;">Breaking Change: </span>Users with cluster ‘<span style="font-weight: bold;">Reader</span>’ only role can no longer submit job to the HDInsight cluster nor access to the cluster storage. Please request the cluster owner or user access administrator to upgrade your role to <span style="font-weight: bold;">HDInsight Cluster Operator</span> or <span style="font-weight: bold;">Contributor</span> in the <a href="https://ms.portal.azure.com">Azure Portal</a>. Click <a href="https://docs.microsoft.com/en-us/azure/role-based-access-control/built-in-roles#contributor">here</a> for more information</li>
         <li>AadProvider.json file is no longer needed for Spark on Cosmos Serverless feature</li>
     </ul>
     <h4>Fixed</h4>