Add API version requirement

Author: asinn826

articles/virtual-machines/troubleshooting/serial-console-enable-disable.md

@@ -35,23 +35,23 @@ Serial console can be disabled and re-enabled for an entire subscription by usin
 
 To disable serial console for a subscription, use the following commands:
 ```azurecli-interactive
-subscriptionId=$(az account show -o=json | jq -r .id)
+subscriptionId=$(az account show --output=json | jq -r .id)
 
-az resource invoke-action --action disableConsole --ids "/subscriptions/$subscriptionId/providers/Microsoft.SerialConsole/consoleServices/default"
+az resource invoke-action --action disableConsole --ids "/subscriptions/$subscriptionId/providers/Microsoft.SerialConsole/consoleServices/default" --api-version="2018-05-01"
 ```
 
 To enable serial console for a subscription, use the following commands:
 ```azurecli-interactive
-subscriptionId=$(az account show -o=json | jq -r .id)
+subscriptionId=$(az account show --output=json | jq -r .id)
 
-az resource invoke-action --action enableConsole --ids "/subscriptions/$subscriptionId/providers/Microsoft.SerialConsole/consoleServices/default"
+az resource invoke-action --action enableConsole --ids "/subscriptions/$subscriptionId/providers/Microsoft.SerialConsole/consoleServices/default" --api-version="2018-05-01"
 ```
 
 To get the current enabled/disabled status of serial console for a subscription, use the following commands:
 ```azurecli-interactive
-subscriptionId=$(az account show -o=json | jq -r .id)
+subscriptionId=$(az account show --output=json | jq -r .id)
 
-az resource show --ids "/subscriptions/$subscriptionId/providers/Microsoft.SerialConsole/consoleServices/default" -o=json | jq .properties
+az resource show --ids "/subscriptions/$subscriptionId/providers/Microsoft.SerialConsole/consoleServices/default" --output=json --api-version="2018-05-01" | jq .properties
 ```
 
 ### PowerShell