Merge pull request #832 from edizor/master

Update README

Author: lor6

scala-akka-2/README.md

@@ -8,3 +8,4 @@
 - [Reading Query Parameters in Akka HTTP](https://www.baeldung.com/scala/akka-http-reading-query-parameters)
 - [Difference Between tell and forward in Akka Actor](https://www.baeldung.com/scala/akka-actor-tell-vs-forward)
 - [Testing an Akka HTTP Application](https://www.baeldung.com/scala/akka-http-testing)
+- [Introduction to Akka-Streams in Scala](https://www.baeldung.com/scala/akka-streams)

scala-core-collections-2/README.md

@@ -6,3 +6,4 @@
 - [Get a Subarray in Scala](https://www.baeldung.com/scala/extract-subarray)
 - [Finding the First Element Matching a Condition in a Collection](https://www.baeldung.com/scala/find-first-match-in-collection)
 - [Append an Element to an Array in Scala](https://www.baeldung.com/scala/array-append-element)
+- [Create a Random Sample of Fixed Size From a Scala List](https://www.baeldung.com/scala/list-uniform-sample)

scala-test/README.md

@@ -9,3 +9,4 @@ This module contains articles about the ScalaTest framework in Scala.
 - [Using ScalaTest With Mockito](https://www.baeldung.com/scala/scalatest-mockito)
 - [Comparing Collection Contents with ScalaTest](https://www.baeldung.com/scala/scalatest-compare-collections)
 - [Using the ScalaTest Runner](https://www.baeldung.com/scala/scalatest-runner)
+- [How to Check If Code Compiles in ScalaTest](https://www.baeldung.com/scala/scalatest-check-compilation)