Add Generative AI with Java to curriculum list (#507)

Included a link to the 'Generative AI with Java' curriculum in the README to provide users with additional learning resources.

README.md

@@ -137,6 +137,7 @@ Our team produces other curricula! Check out:
 - [Generative AI for Beginners](https://aka.ms/genai-beginners)
 - [Generative AI for Beginners .NET](https://github.com/microsoft/Generative-AI-for-beginners-dotnet)
 - [Generative AI with JavaScript](https://github.com/microsoft/generative-ai-with-javascript)
+- [Generative AI with Java](https://github.com/microsoft/Generative-AI-for-beginners-java)
 - [AI for Beginners](https://aka.ms/ai-beginners)
 - [Data Science for Beginners](https://aka.ms/datascience-beginners)
 - [ML for Beginners](https://aka.ms/ml-beginners)