Fix: discounted link URL

Author: danieldanielecki

README.md

@@ -4,7 +4,7 @@
 
 ## Udemy
 
-❣️ Please support us by purchasing this course on Udemy in an interactive version with the [discounted link](www.udemy.com/course/professional-scrum-developer-i-psd-i-practice-exams/?referralcode=e1e5c69cf22100d112dd). If you're working for a company, you could most probably easily claim this expense during preparation for your exam. For us, it's to be, or not to be, in the game.
+❣️ Please support us by purchasing this course on Udemy in an interactive version with the [discounted link](https://www.udemy.com/course/professional-scrum-developer-i-psd-i-practice-exams/?referralCode=E1E5C69CF22100D112DD). If you're working for a company, you could most probably easily claim this expense during preparation for your exam. For us, it's to be, or not to be, in the game.
 
 ## ✨ This course is unlike any Professional Scrum Developer I (PSD I) course you will find online.