Update README.md - Added Copilot Learning Pathway

Author: morganersery1

README.md

@@ -17,6 +17,7 @@ The GitHub Education Teacher Toolbox provides support materials for teachers and
 - [GitHub Foundations for Non-Developers](https://github.com/github-education-resources/teacher-toolbox/blob/main/Learning-Pathways/GitHub-Foundations-Non-Developers.md)
 - [GitHub Issues](https://github.com/github-education-resources/teacher-toolbox/blob/main/Learning-Pathways/Github-Issues.md)
 - [Markdown](https://github.com/github-education-resources/teacher-toolbox/blob/main/Learning-Pathways/Markdown.md)
+- [Getting Started with GitHub Copilot](https://github.com/github-education-resources/teacher-toolbox/blob/main/Learning-Pathways/Getting-started-with-copilot.md)
 - Teaching with GitHub (coming soon)
 
 ## New and Featured Resources