Updated the Azure CLI command

Updated the Azure CLI command to create webapp and other resources

Fixes MicrosoftDocs/azure-docs/issues#102560

Author: ketan-chawda-msft

articles/app-service/quickstart-golang.md

@@ -67,7 +67,7 @@ az login
 Create the webapp and other resources, then deploy your code to Azure using [az webapp up](/cli/azure/webapp#az-webapp-up).
 
 ```azurecli
-az webapp up --runtime GO:1.18 --sku B1 
+az webapp up --runtime GO:1.18 --os linux --sku B1
 ```
 
 * The `--runtime` parameter specifies what version of Go your app is running. This example uses Go 1.18. To list all available runtimes, use the command `az webapp list-runtimes --os linux --output table`.