[nva] updating the description (#21599)

JainRah · web-flow · commit 80e9ff787c1b · 2023-04-20T09:03:56.000+08:00
diff --git a/src/Network/Network/help/New-AzNetworkVirtualAppliance.md b/src/Network/Network/help/New-AzNetworkVirtualAppliance.md
@@ -31,7 +31,7 @@ New-AzNetworkVirtualAppliance -ResourceId <String> -Location <String> -VirtualHu
 ```
 
 ## DESCRIPTION
-The New-AzNetworkVirtualAppliance command creates a Network Virtual Appliance resource in Azure.
+The **New-AzNetworkVirtualAppliance** command creates a Network Virtual Appliance(NVA) resource in Azure.
 
 ## EXAMPLES
 
