Fix address prefixes overlapping between hub and remote virtual network (Azure#27679)

Author: aldairzamoramsft

src/Network/Network/help/Update-AzVirtualHubVnetConnection.md

@@ -41,11 +41,11 @@ Updates an existing HubVirtualNetworkConnection.
 ### Example 1
 ```powershell
 New-AzResourceGroup -Location "West US" -Name "testRG"
-$frontendSubnet = New-AzVirtualNetworkSubnetConfig -Name frontendSubnet -AddressPrefix "10.0.1.0/24"
-$backendSubnet  = New-AzVirtualNetworkSubnetConfig -Name backendSubnet  -AddressPrefix "10.0.2.0/24"
-$remoteVirtualNetwork = New-AzVirtualNetwork -Name "MyVirtualNetwork" -ResourceGroupName "testRG" -Location "West US" -AddressPrefix "10.0.0.0/16" -Subnet $frontendSubnet,$backendSubnet
+$frontendSubnet = New-AzVirtualNetworkSubnetConfig -Name frontendSubnet -AddressPrefix "10.1.1.0/24"
+$backendSubnet  = New-AzVirtualNetworkSubnetConfig -Name backendSubnet  -AddressPrefix "10.1.2.0/24"
+$remoteVirtualNetwork = New-AzVirtualNetwork -Name "MyVirtualNetwork" -ResourceGroupName "testRG" -Location "West US" -AddressPrefix "10.1.0.0/16" -Subnet $frontendSubnet,$backendSubnet
 $virtualWan = New-AzVirtualWan -ResourceGroupName "testRG" -Name "myVirtualWAN" -Location "West US"
-New-AzVirtualHub -VirtualWan $virtualWan -ResourceGroupName "testRG" -Name "westushub" -AddressPrefix "10.0.1.0/24"
+New-AzVirtualHub -VirtualWan $virtualWan -ResourceGroupName "testRG" -Name "westushub" -AddressPrefix "10.0.1.0/24" -Location "West US"
 New-AzVirtualHubVnetConnection -ResourceGroupName "testRG" -VirtualHubName "westushub" -Name "testvnetconnection" -RemoteVirtualNetwork $remoteVirtualNetwork
 Update-AzVirtualHubVnetConnection -ResourceGroupName "testRG" -VirtualHubName "westushub" -Name "testvnetconnection" -EnableInternetSecurity $true
 ```