Update README.md

Updating "Other Courses" to include Security Course

Author: WirelessLife

README.md

@@ -151,6 +151,7 @@ Our team produces other curricula! Check out:
 - [AI for Beginners](https://aka.ms/ai-beginners)
 - [Data Science for Beginners](https://aka.ms/datascience-beginners)
 - [Generative AI for Beginners](https://aka.ms/genai-beginners)
+- [**NEW** Cybersecurity for Beginners](https://github.com/microsoft/Security-101??WT.mc_id=academic-96948-sayoung)
 - [Web Dev for Beginners](https://aka.ms/webdev-beginners?WT.mc_id=academic-113596-abartolo)
 - [IoT for Beginners](https://aka.ms/iot-beginners)
 - [Machine Learning for Beginners](https://aka.ms/ml-beginners)