dash is missing in the command line

Added the missing dash
Register-AzProviderFeature -FeatureName AllowRoutingPreferenceFeature -ProviderNamespace Microsoft.Network

Author: nayak-mahesh

articles/virtual-network/configure-routing-preference-virtual-machine-powershell.md

@@ -28,7 +28,7 @@ This article shows you how to create a virtual machine with a public IP that is
 ## Register the feature for your subscription
 The Routing Preference feature is currently in preview. Register the feature for your subscription as follows:
 ```azurepowershell
-Register-AzProviderFeature -FeatureName AllowRoutingPreferenceFeature ProviderNamespace Microsoft.Network
+Register-AzProviderFeature -FeatureName AllowRoutingPreferenceFeature -ProviderNamespace Microsoft.Network
 ```
 
 ## Create a resource group
@@ -153,4 +153,4 @@ When no longer needed, you can use the [Remove-AzResourceGroup](/powershell/modu
 
 * Learn more about [routing preference in public IP addresses](routing-preference-overview.md).
 * Learn more about [public IP addresses](virtual-network-ip-addresses-overview-arm.md#public-ip-addresses) in Azure.
-* Learn more about [public IP address settings](virtual-network-public-ip-address.md#create-a-public-ip-address).
+* Learn more about [public IP address settings](virtual-network-public-ip-address.md#create-a-public-ip-address).