update titles

Author: ChrisHowd

Instructions/Labs/LAB_AK_03_develop_code_features.md

@@ -4,7 +4,7 @@ lab:
     description: 'Learn how to accelerate the development of new code features using GitHub Copilot in Visual Studio Code.'
 ---
 
-# Develop code features using GitHub Copilot
+# Develop new code features using GitHub Copilot
 
 GitHub Copilot's code completion and interactive chat features help developers write code faster and with fewer errors. It provides suggestions for code snippets, functions, and even entire classes based on the context of the code being written. In this exercise, you use GitHub Copilot to accelerate the development of new code features in Visual Studio Code.
 

Instructions/Labs/LAB_AK_05_refactor_improve_existing_code.md

@@ -4,9 +4,9 @@ lab:
     description: 'Learn how to refactor and improve existing code sections using GitHub Copilot in Visual Studio Code.'
 ---
 
-# Refactor and improve existing code sections using GitHub Copilot
+# Refactor existing code using GitHub Copilot
 
-GitHub Copilot can be used to evaluate your entire codebase and suggest changes that refactor and/or improve your code. In this exercise, you use GitHub Copilot to refactor specified sections of a C# application while making improvements to code quality, reliability, performance, and security.
+GitHub Copilot can be used to evaluate your entire codebase and suggest updates that help you to refactor and improve your code. In this exercise, you use GitHub Copilot to refactor specified sections of a C# application while making improvements to code quality, reliability, performance, and security.
 
 This exercise should take approximately **15** minutes to complete.