Update README.md

Author: rcalago

libraries-ai/README.md

@@ -1,4 +1,4 @@
 ## Relevant Articles
 - [Overview of NLP Libraries in Java](https://www.baeldung.com/java-nlp-libraries)
 - [Introduction to Neuroph](https://www.baeldung.com/neuroph)
-- [Replacing Strings in Java Using Regex: Back Reference vs. Lookaround](https://www.baeldung.com/java-regex-replace-strings-back-reference-vs-lookaround)
+- [OpenAI API Client in Java](https://www.baeldung.com/java-openai-api-client)