Update links to course in README.md

Author: LukasLechnerDev

README.md

@@ -42,9 +42,9 @@ Sign up to my [newsletter](https://www.lukaslechner.com/newsletter/) to never mi
 
 ## 🎓 Online Course
 
-This project is the foundation of a comprehensive Online Course about [Kotlin Coroutines and Flow for Android Development](https://www.udemy.com/course/coroutines-on-android/?referralCode=EE8CCB9284B14877724C)
+This project is the foundation of a comprehensive Online Course about [Kotlin Coroutines and Flow for Android Development](https://lukaslechner.com/coroutines-flow-android?source=github)
 
-[![CourseCoroutinesOnAndroid](documentation/images/course.png)](https://www.udemy.com/course/coroutines-on-android/?referralCode=EE8CCB9284B14877724C)
+[![CourseCoroutinesOnAndroid](documentation/images/course.png)](https://lukaslechner.com/coroutines-flow-android?source=github)
 
 ## 📢 Sharing is Caring