Merge pull request #1503 from amnabibi786/patch-5

Update README.md

Author: lor6

scala-core-modules/scala-strings-2/README.md

@@ -3,4 +3,5 @@
 This module contains articles about Scala's Strings.
 
 ### Relevant Articles:
+-  [How to Check if a String Is Null or Empty in Scala](https://www.baeldung.com/scala/string-test-null-empty)
 -  [Convert From Camel Case to Snake Case in Scala](https://www.baeldung.com/scala/camel-snake-case-automatic-conversion)