Update free-courses-en.md (#7158)

Co-authored-by: Peter Morrison <peter.morrison@medlior.com>

courses/free-courses-en.md

@@ -517,7 +517,7 @@
 
 ### Java
 
-* [Advanced Software Construction in Java](https://openlearninglibrary.mit.edu/courses/course-v1:MITx+6.005.2x+1T2017/about)
+* [Advanced Software Construction in Java](https://openlearninglibrary.mit.edu/courses/course-v1:MITx+6.005.2x+1T2017/about) - MIT Open Learning Library
 * [Central Connecticut State University, Introduction to CS Using Java](http://chortle.ccsu.edu/CS151/cs151java.html)
 * [CS106A - Programming Methodology](https://see.stanford.edu/Course/CS106A) (Stanford)
 * [Introduction to Java](http://ocw.mit.edu/courses/electrical-engineering-and-computer-science/6-092-introduction-to-programming-in-java-january-iap-2010/)
@@ -541,7 +541,7 @@
 * [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://openlearninglibrary.mit.edu/courses/course-v1:MITx+6.005.1x+3T2016/about)
+* [Software Construction in Java](https://openlearninglibrary.mit.edu/courses/course-v1:MITx+6.005.1x+3T2016/about) - MIT Open Learning Library
 * [Spring 5 Core - An Ultimate Guide](https://www.udemy.com/learn-spring-5-core-from-scratch/) - Somnath Musib (Udemy)