Update link text for GitHub Copilot resource

Updated link text for Mastering GitHub Copilot resource.

Author: WirelessLife

README.md

@@ -187,7 +187,7 @@ Our team produces other courses! Check out:
 - [Web Dev for Beginners](https://aka.ms/webdev-beginners)
 - [IoT for Beginners](https://aka.ms/iot-beginners)
 - [XR Development for Beginners](https://github.com/microsoft/xr-development-for-beginners)
-- [Mastering GitHub Copilot for Paired Programming](https://github.com/microsoft/Mastering-GitHub-Copilot-for-Paired-Programming)
+- [Mastering GitHub Copilot for Agentic use](https://github.com/microsoft/Mastering-GitHub-Copilot-for-Paired-Programming)
 - [Mastering GitHub Copilot for C#/.NET Developers](https://github.com/microsoft/mastering-github-copilot-for-dotnet-csharp-developers)
 - [Choose Your Own Copilot Adventure](https://github.com/microsoft/CopilotAdventures)