Update ChangeLog.md

Author: JoyerJin

src/StreamAnalytics/StreamAnalytics/ChangeLog.md

@@ -18,7 +18,7 @@
         - Additional information about change #1
 -->
 ## Upcoming Release
-* Introduced various new features by upgrading code generator. Please see details [here](https://github.com/Azure/azure-powershell/blob/main/documentation/Autorest-powershell-v4-new-features.md).
+* Improved user experience and consistency. This may introduce breaking changes. Please refer to [here](https://go.microsoft.com/fwlink/?linkid=2340249).
 
 ## Version 2.1.1
 * Preannounced breaking changes. Please refer to https://go.microsoft.com/fwlink/?linkid=2333229