Update ChangeLog.md

Author: Maddie Clayton

src/AnalysisServices/AnalysisServices/ChangeLog.md

@@ -18,9 +18,10 @@
         - Additional information about change #1
 -->
 ## Upcoming Release
+* Deprecated AddAzureASAccount cmdlet
 
 ## Version 1.0.1
 * Release with updated Authentication dependency
 
 ## Version 1.0.0
-* General availability of `Az.AnalysisServices` module
+* General availability of `Az.AnalysisServices` module