fix: typo (#18)

Fix minor verbiage error

Author: gclhub

README.md

@@ -6,7 +6,7 @@ _Learn how to give GitHub Copilot more tools to expand the capabilities of your
 
 - **Who is this for**: Developers looking to enhance their AI-assisted workflows, GitHub Copilot users, and AI enthusiasts.
 - **What you'll learn**: We'll introduce MCP basics, a GitHub MCP server setup, and integration with Copilot Agent Mode.
-- **What you'll build**: A mixed development workflow that uses GitHub Copilot to manage issues while upgrading the extra curricular activities website for Mergington High School.
+- **What you'll build**: A mixed development workflow that uses GitHub Copilot to manage issues while upgrading the extracurricular activities website for Mergington High School.
 - **Prerequisites**: [Getting Started with Copilot](https://github.com/skills/getting-started-with-github-copilot) Exercise
 - **How long**: This exercise takes less than one hour to complete.