adding deprecation notice in prep for archiving

Author: maxkahan

README.md

@@ -1,5 +1,11 @@
 # Nexmo Code Snippets for Python
 
+## ❗❗❗ **The Python code snippets have moved!**
+
+## **This repo is now deprecated. Current, maintained snippets can now be found in the [`vonage-python-code-snippets` repo](https://github.com/Vonage/vonage-python-code-snippets).**
+
+--------------------------------
+
 <img src="https://developer.nexmo.com/assets/images/Vonage_Nexmo.svg" height="48px" alt="Nexmo is now known as Vonage" />
 
 Code snipets also available for: [Java](https://github.com/nexmo/nexmo-java-code-snippets), [.NET](https://github.com/nexmo/nexmo-dotnet-code-snippets), [Node.js](https://github.com/nexmo/nexmo-node-code-snippets), [PHP](https://github.com/nexmo/nexmo-php-code-snippets), [Ruby](https://github.com/nexmo/nexmo-ruby-code-snippets), [Curl](https://github.com/Nexmo/nexmo-curl-code-snippets) and [Android](https://github.com/nexmo-community/quickstart-android)