Update in changelog

Author: Nilambari

src/ServiceManagement/Services/Commands.Utilities/ChangeLog.md

@@ -23,6 +23,9 @@
 
     - ChefServiceInterval : Specifies the frequency (in minutes) at which the chef-service runs. If in case you don't want the chef-service to be installed on the Azure VM then set value as 0 in this field. e.g. -ChefServiceInterval 45
 
+* Updated New-AzureVirtualNetworkGatewayConnection cmdlet to add validation on acceptable input parameter:GatewayConnectionType values sets and it can be case insensitive:
+    - GatewayConnectionType : Added validation to accept only set of values:- 'ExpressRoute'/'IPsec'/'Vnet2Vnet'/'VPNClient' and acceptable set of values can be passed in any casing.
+
 * Updating Managed Cache warning message which notifies customer about service deprecation on the following cmdlets :
 Get-AzureManagedCache
 Get-AzureManagedCacheAccessKey