Merge pull request #799 from edizor/master

Update README.md

Author: lor6

scala-libraries-5/README.md

@@ -1,3 +1,4 @@
 ## Relevant Articles
 - [Joining Two DataFrames in Scala Spark](https://www.baeldung.com/scala/spark-joining-dataframes)
 - [Introduction to Spire](https://www.baeldung.com/scala/spire-intro)
+- [Introduction to Kafka With Scala](https://www.baeldung.com/scala/kafka)