added programming in Java by NPTLE (#5925)

Co-authored-by: Adain, Mohammed Wazir <adain@deshaw.com>

courses/free-courses-en.md

@@ -415,6 +415,7 @@
 * [Object-Oriented programming with Java, part II](https://moocfi.github.io/courses/2013/programming-part-2/)
 * [Princeton Algorithms, Part 1](https://www.coursera.org/course/algs4partI)
 * [Problem Solving With Java](https://www.udacity.com/course/intro-to-java-programming--cs046) (Udacity)
+* [Programming in Java](https://nptel.ac.in/courses/106/105/106105191/) - Prof. Debasis Samanta (NPTEL)
 * [Software Construction in Java](https://www.edx.org/course/software-construction-java-mitx-6-005-1x)
 * [Spring 5 Core - An Ultimate Guide](https://www.udemy.com/learn-spring-5-core-from-scratch/) - Somnath Musib (Udemy)