update changelog.md

Author: Ivan Liu

src/DataFactory/DataFactoryV2/Changelog.md

@@ -19,6 +19,7 @@
 -->
 ## Upcoming Release
 * Update ADF .Net SDK version to 4.4.0
+* Add parameter "ExpressCustomSetup" for "Set-AzureRmDataFactoryV2IntegrationRuntime" cmd to enable setup configurations and 3rd party components without custom setup script.
 
 ## Version 1.4.1
 * Update ADF .Net SDK version to 4.3.0