update cmdlet syntax

Author: isra-fel

src/Network/Network/help/New-AzNetworkInterface.md

@@ -70,8 +70,8 @@ created automatically using the name IPConfiguration1.
 
 ### Example 2: Create an Azure network interface using an IP configuration object
 ```
-PS C:\>$Subnet = Get-AzVirtualNetwork -name "VirtualNetwork1" -ResourceGroupName "ResourceGroup1" 
-PS C:\>$IPconfig = New-AzNetworkInterfaceIpConfig -Name "IPConfig1" -PrivateIpAddressVersion IPv4 -PrivateIpAddress "10.0.1.10" -SubnetId $Subnet.subnets[0].id
+PS C:\>$Subnet = Get-AzVirtualNetwork -Name "VirtualNetwork1" -ResourceGroupName "ResourceGroup1" 
+PS C:\>$IPconfig = New-AzNetworkInterfaceIpConfig -Name "IPConfig1" -PrivateIpAddressVersion IPv4 -PrivateIpAddress "10.0.1.10" -SubnetId $Subnet.Subnets[0].Id
 PS C:\> New-AzNetworkInterface -Name "NetworkInterface1" -ResourceGroupName "ResourceGroup1" -Location "centralus" -IpConfiguration $IPconfig
 ```