doc: add ref

Author: sunnivin

README.md

@@ -8,6 +8,6 @@ This repository contains a [talk](https://sunnivin.github.io/a-new-core/talk/sli
 
 The material in the slides and demo are based on the content from the following sources:
 
-- [Episode 238: Charlie Marsh: Accelerating Python toolong with Ruff and uv](https://realpython.com/podcasts/rpp/238/) 
+- [Episode 238: Charlie Marsh: Accelerating Python toolong with Ruff and uv](https://realpython.com/podcasts/rpp/238/) of The Real Python Podcast
 - [Python Developer Tooling Handbook](https://pydevtools.com/handbook/), accessed 20.05.25
 - [History of Python](https://en.wikipedia.org/wiki/History_of_Python), accessed 19.05.25