Azure Analysis Services: change log updated with latest changes

Author: Igor Uzhviev

src/ResourceManager/AnalysisServices/ChangeLog.md

@@ -19,11 +19,9 @@
 -->
 ## Current Release
 
-## Version 0.3.0
-
-## Version 0.2.0
-
-## Version 0.1.0
+## Version 0.4.0
+* New SKUs added: B1, B2, S0
+* Scale up/down support added
 
 ## Version 0.0.4
 * Added State property in additional to ProvisioningState