[Changes made] Update free-courses-en.md (#11374)

* Update free-courses-bn.md

* Update free-courses-en.md

* Update free-courses-en.md

courses/free-courses-en.md

@@ -1630,6 +1630,7 @@
 ### Scala
 
 * [Functional Programming in Scala Specialization](https://www.coursera.org/course/reactive)
+* [Scala at Light Speed](https://www.youtube.com/playlist?list=PLmtsMNDRU0BxryRX4wiwrTZ661xcp6VPM) - Rock the JVM
 
 
 ### Security