Update README to reference GitHub Copilot

Author: DanWahlin

05-skills/README.md

@@ -2,7 +2,7 @@
 
 > **What if Copilot could automatically apply your team's best practices without you having to explain them every time?**
 
-In this chapter, you'll learn about Agent Skills: folders of instructions that Copilot automatically loads when relevant to your task. While agents change *how* Copilot thinks, skills teach Copilot *specific ways to complete tasks*. You'll create a security audit skill that Copilot applies whenever you ask about security, build team-standard review criteria that ensure consistent code quality, and learn how skills work across Copilot CLI, VS Code, and the Copilot cloud agent.
+In this chapter, you'll learn about Agent Skills: folders of instructions that Copilot automatically loads when relevant to your task. While agents change *how* Copilot thinks, skills teach Copilot *specific ways to complete tasks*. You'll create a security audit skill that Copilot applies whenever you ask about security, build team-standard review criteria that ensure consistent code quality, and learn how skills work across Copilot CLI, VS Code, and the GitHub Copilot cloud agent.
 
 
 ## 🎯 Learning Objectives