updated Network Watcher cmdlet

Author: TravisCragg-MSFT

articles/network-watcher/network-watcher-troubleshoot-manage-powershell.md

@@ -42,7 +42,7 @@ Resource troubleshooting provides the ability troubleshoot issues that arise wit
 The first step is to retrieve the Network Watcher instance. The `$networkWatcher` variable is passed to the `Start-AzNetworkWatcherResourceTroubleshooting` cmdlet in step 4.
 
 ```powershell
-$networkWatcher = Get-AzResource | Where {$_.ResourceType -eq "Microsoft.Network/networkWatchers" -and $_.Location -eq "WestCentralUS" } 
+$networkWatcher = Get-AzNetworkWatcher -Location "WestCentralUS" 
 ```
 
 ## Retrieve a Virtual Network Gateway Connection