Update ChangeLog.md

Author: cormacpayne

src/ContainerInstance/ContainerInstance/ChangeLog.md

@@ -19,8 +19,8 @@
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 ## Upcoming Release
+* Fixed issue in the -Command parameter of New-AzContainerGroup which added a trailing empty argument
 
 ## Version 1.0.0
 * General availability of `Az.ContainerInstance` module
 * Added managed identity support
-* Fixed issue in the -Command parameter of New-AzContainerGroup which added a trailing empty argument