update file

Author: jamesmontemagno

03-Introduction-to-GitHub-Copilot/README.md

@@ -17,7 +17,7 @@ Note: Although this module uses [Codespaces](https://github.com/codespaces), you
 
 - **Who this is for**: Developers, DevOps Engineers, Software development managers, Testers.
 - **What you'll learn**: How to install Copilot into a Codespace, accept suggestions from code, accept suggestions from comments.
-- **What you'll build**: Javascript files that will have code generated by Copilot AI for code and comment suggestions.
+- **What you'll build**: C# files that will have code generated by Copilot AI for code and comment suggestions.
 - **Prerequisites**: GitHub Copilot is available to use for free, sign up for [GitHub Copilot](https://gh.io/copilot).
 - **Timing**: This course can be completed in under an hour.