Update free-courses-en.md (#8443)

Added a course.

courses/free-courses-en.md

@@ -675,6 +675,7 @@
 * [JSP (Java server pages) and servlet basics](https://www.udemy.com/course/jsp-servlet-free/) - StudyEasy Organisation, Chaand Sheikh (Udemy)
 * [Learn how to program: Java](https://www.learnhowtoprogram.com/java-june-2017) - Epicodus Inc.
 * [Learn Java](https://www.sololearn.com/learning/1068) - Sololearn *(email address required)*
+* [Learn Java Programming](https://www.programiz.com/java-programming) - Programiz
 * [Object Oriented Programming (OOP) In Java Course](https://www.youtube.com/playlist?list=PL9gnSGHSqcno1G3XjUbwzXHL8_EttOuKk) - Kunal Kushwaha (YouTube)
 * [Object-Oriented programming with Java, part I](https://moocfi.github.io/courses/2013/programming-part-1/)
 * [Object-Oriented programming with Java, part II](https://moocfi.github.io/courses/2013/programming-part-2/)