The argument should be functions-version

The commands generate an error stating:
az: error: unrecognized arguments: --functions_version 2

The correct argument should be --functions-version 2

Author: SimonWahlin

articles/azure-functions/functions-create-first-azure-function-azure-cli.md

@@ -269,7 +269,7 @@ Use the following Azure CLI commands to create these items. Each command provide
     If you are using Python 3.6, also change `--runtime-version` to `3.6`.
 
     ```azurecli
-    az functionapp create --resource-group AzureFunctionsQuickstart-rg --os-type Linux --consumption-plan-location westeurope --runtime python --runtime-version 3.7 --functions_version 2 --name <APP_NAME> --storage-account <STORAGE_NAME>
+    az functionapp create --resource-group AzureFunctionsQuickstart-rg --os-type Linux --consumption-plan-location westeurope --runtime python --runtime-version 3.7 --functions-version 2 --name <APP_NAME> --storage-account <STORAGE_NAME>
     ```
     ::: zone-end  
 
@@ -278,19 +278,19 @@ Use the following Azure CLI commands to create these items. Each command provide
 
     
     ```azurecli
-    az functionapp create --resource-group AzureFunctionsQuickstart-rg --consumption-plan-location westeurope --runtime node --runtime-version 10 --functions_version 2 --name <APP_NAME> --storage-account <STORAGE_NAME>
+    az functionapp create --resource-group AzureFunctionsQuickstart-rg --consumption-plan-location westeurope --runtime node --runtime-version 10 --functions-version 2 --name <APP_NAME> --storage-account <STORAGE_NAME>
     ```
     ::: zone-end  
 
     ::: zone pivot="programming-language-csharp"  
     ```azurecli
-    az functionapp create --resource-group AzureFunctionsQuickstart-rg --consumption-plan-location westeurope --runtime dotnet --functions_version 2 --name <APP_NAME> --storage-account <STORAGE_NAME>
+    az functionapp create --resource-group AzureFunctionsQuickstart-rg --consumption-plan-location westeurope --runtime dotnet --functions-version 2 --name <APP_NAME> --storage-account <STORAGE_NAME>
     ```
     ::: zone-end  
     
     ::: zone pivot="programming-language-powershell"  
     ```azurecli
-    az functionapp create --resource-group AzureFunctionsQuickstart-rg --consumption-plan-location westeurope --runtime powershell --functions_version 2 --name <APP_NAME> --storage-account <STORAGE_NAME>
+    az functionapp create --resource-group AzureFunctionsQuickstart-rg --consumption-plan-location westeurope --runtime powershell --functions-version 2 --name <APP_NAME> --storage-account <STORAGE_NAME>
     ```
     ::: zone-end