Add az --version check

Author: kraigb

articles/app-service/containers/quickstart-python.md

@@ -20,7 +20,7 @@ If you prefer to deploy apps through an IDE, see [Deploy Python apps to App Serv
 - Azure subscription - [create one for free](https://azure.microsoft.com/free/?ref=microsoft.com&utm_source=microsoft.com&utm_medium=docs&utm_campaign=visualstudio)
 - <a href="https://www.python.org/downloads/" target="_blank">Python 3.7</a> (Python 3.6 is also supported)
 - <a href="https://git-scm.com/downloads" target="_blank">Git</a>
-- <a href="https://docs.microsoft.com/cli/azure/install-azure-cli" target="_blank">Azure CLI</a>
+- <a href="https://docs.microsoft.com/cli/azure/install-azure-cli" target="_blank">Azure CLI</a> 2.0.80 or higher. Run `az --version` to check your version.
 
 ## Download the sample