Wording adjustment and link to Copilot Coding Agent exercise in review (#76)

Author: FidelusAleksander

.github/steps/1-preparing.md

@@ -32,7 +32,7 @@ As you work, you'll find GitHub Copilot can help out in several places across th
 
 Let's start up our development environment, use copilot to learn a bit about the project, and then give it a test run.
 
-1. Left-click the below button to open the **Create Codespace** page in a new tab. Use the default configuration.
+1. Use the below button to open the **Create Codespace** page in a new tab. Use the default configuration.
 
    [![Open in GitHub Codespaces](https://github.com/codespaces/badge.svg)](https://codespaces.new/{{full_repo_name}}?quickstart=1)
 

.github/steps/x-review.md

@@ -20,7 +20,7 @@ Here's a recap of your accomplishments:
   - Use Copilot with different models.
 - Check out the other [GitHub Skills exercises](https://skills.github.com).
   - Learn how to [Integrate MCP with Copilot](https://github.com/skills/integrate-mcp-with-copilot)
-  - Try building your first [GitHub Copilot Extension](https://github.com/skills/your-first-extension-for-github-copilot)
+  - Try GitHub Copilot Coding Agent in the [Expand your team with Copilot](https://github.com/skills/expand-your-team-with-copilot) exercise
 
 Check out these resources to learn more about GitHub Copilot :