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)
 <br>
-Course lecturer - **[Mario Zahariev](https://github.com/zahariev-webbersof)**
+Course Lecturer - **[Mario Zahariev](https://github.com/zahariev-webbersof)**
+<br>
+Course Exercise Lecturer - **[Diyan Kalaydzhiev](https://github.com/DiyanKalaydzhiev23)**
 
 | Python Advanced | Python OOP |
 | --------------- | ---------- |