Update README.md

Author: MitkoVtori

README.md

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 # Python Advanced & OOP 2023
-Course - [Softuni Python Advanced & OOP 2023](https://softuni.bg/trainings/3963/python-advanced-january-2023#lesson-49371)
+Course - [Softuni Python Advanced & OOP 2023](https://softuni.bg/trainings/3963/python-advanced-january-2023)
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 Course lecturer - **[Mario Zahariev](https://github.com/zahariev-webbersof)**