Update README.md

Author: johnA1331

libraries-data-io/README.md

@@ -10,3 +10,4 @@ This module contains articles about IO data processing libraries.
 - [Interact with Google Sheets from Java](https://www.baeldung.com/google-sheets-java-client)
 - [Introduction To Docx4J](https://www.baeldung.com/docx4j)
 - [Breaking YAML Strings Over Multiple Lines](https://www.baeldung.com/yaml-multi-line)
+- [Different Serialization Approaches for Java](https://www.baeldung.com/java-serialization-approaches)