Updated link to python_basics to markdown file

Author: l-white

README.md

@@ -4,7 +4,7 @@ Resources and notes for the Zero to Mastery [Complete Python Developer course](h
 
 - Introduction
 - Python Introduction
-- [Python Basics](https://github.com/zero-to-mastery/Complete-Python-Developer-Manuel/blob/main/python_basics.ipynb)
+- [Python Basics](https://github.com/zero-to-mastery/Complete-Python-Developer-Manual/blob/main/markdown/python_basics.md)
 - Python Basics 2
 - Developer Environment
 - [Advanced Python: Object-Oriented Programming](https://github.com/zero-to-mastery/Complete-Python-Developer-Manual/blob/main/object_oriented_programming.ipynb)