Polish changelog for az.accounts (#14080)

* Update ChangeLog.md

* Update ChangeLog.md

* Create ChangeLog.md

Co-authored-by: Dingmeng Xue <dixue@microsoft.com>

src/Accounts/Accounts/ChangeLog.md

@@ -19,7 +19,7 @@
 -->
 ## Upcoming Release
 * Tracked CloudError code in exception
-* Invoked on clear context listener in Azure session to be cleared when `Clear-AzContext` was executed
+* Raised 'ContextCleared' event when `Clear-AzContext` was executed
 
 ## Version 2.2.4
 * Shown correct client request id on debug message [#13745]