added python course (#6125)

* added python course

* Update courses/free-courses-tr.md
Co-authored-by: NDavid Ordás <3125580+davorpa@users.noreply.github.com>
Co-authored-by: NDavid Ordás <3125580+davorpa@users.noreply.github.com>

courses/free-courses-tr.md

@@ -3,6 +3,7 @@
 * [Algoritmalar](#algoritmalar)
 * [CSS](#css)
 * [JavaScript](#javascript)
+* [Python](#python)
 * [Temel programlama](#temel-programlama)
 
 
@@ -21,6 +22,11 @@
 * [JavaScript Dersleri](https://javascript.sitesi.web.tr) - Murat Eliçalişkan
 
 
+### Python
+
+* [Sıfırdan İleri Seviye Profesyonel Python Yazılım Geliştiricisi Olma Kursu (2021)](https://www.youtube.com/playlist?list=PLK6Whnd55IH5i1klkNSBDasIaO77l-Bm9) - Mert Mekatronik
+
+
 ### Temel programlama
 
 * [Bilgisayar programlama I](https://acikders.ankara.edu.tr/course/view.php?id=8750) - Semra Gündüç