updated ChangeLog

Author: anusapan

src/IotHub/IotHub/ChangeLog.md

@@ -18,10 +18,10 @@
         - Additional information about change #1
 -->
 ## Upcoming Release
+* Add support to invoke failover for an IotHub to the geo-paired disaster recovery region.
 
 ## Version 1.2.1
 * Fixed miscellaneous typos across module
-* Add support to invoke failover for an IotHub to the geo-paired disaster recovery region.
 
 ## Version 1.2.0
 * Add support to regenerate authorization policy keys.