Ref to old SDK

Author: clairekinde11

src/content/docs/developer-tools/sdks/backend/python-sdk.mdx

@@ -17,6 +17,8 @@ The Kinde Python SDK allows developers to quickly and securely integrate a new o
 - Kinde Python SDK supports Python 3.9+
 - If you haven't already got a Kinde account, [register for free here](https://app.kinde.com/register) (no credit card required). Registering gives you a Kinde domain, which you need to get started, e.g. `yourapp.kinde.com`.
 
+If you are using a previous version of Python, you may need to refer to the [previous SDK](/developer-tools/sdks/backend/python-sdk-v1/).
+
 For new projects, you can also find our [Starter Kit on GitHub](https://github.com/kinde-starter-kits/python-starter-kit).
 
 ## Install