adding NuGet update to instructions

Author: ChrisHowd

Instructions/Labs/LAB_AK_02_analyze_document_code.md

@@ -10,7 +10,7 @@ GitHub Copilot can help you understand and document a codebase by generating exp
 
 This exercise should take approximately **20** minutes to complete.
 
-> **IMPORTANT**: If you don't have a GitHub account, you can <a href="https://go.microsoft.com/fwlink/?linkid=2320148" target="_blank">sign up</a> for a free individual account and use a GitHub Copilot Free plan to complete this exercise. If you have access to a GitHub Copilot Pro, GitHub Copilot Business, or GitHub Copilot Enterprise subscription from within your lab environment, you can use your existing GitHub Copilot subscription to complete this exercise.
+> **IMPORTANT**: If you don't have a GitHub account, you can <a href="https://go.microsoft.com/fwlink/?linkid=2320148" target="_blank">sign up</a> for a free individual account and use a GitHub Copilot Free plan to complete this exercise. If you have access to a GitHub Copilot Pro, Pro+, Business, or Enterprise subscription from within your lab environment, you can use your existing GitHub Copilot subscription to complete this exercise.
 
 ## Before you start
 
@@ -38,6 +38,12 @@ Your colleague has developed an initial version of the library application and h
 
 Use the following steps to set up the library application:
 
+1. Open a command terminal and then run the following command:
+
+    ```bash
+    dotnet nuget add source https://api.nuget.org/v3/index.json -n nuget.org
+    ```
+
 1. Open a browser window in your lab environment.
 
 1. To download a zip file containing the library application, navigate to the following URL: [GitHub Copilot lab - Analyze and document code](https://github.com/MicrosoftLearning/mslearn-github-copilot-dev/raw/refs/heads/main/DownloadableCodeProjects/Downloads/AZ2007LabAppM2.zip)