[nva] Updating the nva help file using Update-MarkdownHelp (#21607)

Author: JainRah

src/Network/Network/help/Get-AzNetworkVirtualAppliance.md

@@ -31,7 +31,7 @@ The Get-AzNetworkVirtualAppliance commands gets or lists Network Virtual Applian
 
 ### Example 1
 ```powershell
-Get-AzNetworkVirtualAppliance -ResourceGroupName testrg -Name nva                                                                                                                      
+Get-AzNetworkVirtualAppliance -ResourceGroupName testrg -Name nva
 ```
 
 ```output

src/Network/Network/help/Get-AzNetworkVirtualApplianceSku.md

@@ -24,7 +24,7 @@ The Get-AzNetworkVirtualApplianceSku gets or lists available Network Virtual App
 
 ### Example 1
 ```powershell
-Get-AzNetworkVirtualApplianceSku -SkuName barracudasdwanrelease                                                                                                                        
+Get-AzNetworkVirtualApplianceSku -SkuName barracudasdwanrelease
 ```
 
 ```output
@@ -40,7 +40,7 @@ Get a sku by name.
 
 ### Example 2
 ```powershell
-Get-AzNetworkVirtualApplianceSku                                                                                                                                                       
+Get-AzNetworkVirtualApplianceSku
 ```
 
 ```output

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

@@ -40,7 +40,6 @@ The **New-AzNetworkVirtualAppliance** command creates a Network Virtual Applianc
 $sku=New-AzVirtualApplianceSkuProperty -VendorName "barracudasdwanrelease" -BundledScaleUnit 1 -MarketPlaceVersion 'latest'
 $hub=Get-AzVirtualHub -ResourceGroupName testrg -Name hub
 $nva=New-AzNetworkVirtualAppliance -ResourceGroupName testrg -Name nva -Location eastus2 -VirtualApplianceAsn 1270 -VirtualHubId $hub.Id -Sku $sku -CloudInitConfiguration "echo Hello World!"
-
 ```
 
 Creates a new Network Virtual Appliance resource in resource group: testrg.

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

@@ -35,6 +35,8 @@ Modify the Virtual Appliance ASN number.
 Update or Change a Network Virtual Appliance resource. (autogenerated)
 
 <!-- Aladdin Generated Example -->
+
+
 ```powershell
 Update-AzNetworkVirtualAppliance -Name nva -ResourceGroupName testrg -Sku <PSVirtualApplianceSkuProperties>
 ```