Update index.yml

Author: cyz

learn-pr/wwl-azure/generate-documentation-using-github-copilot-tools/index.yml

@@ -24,13 +24,16 @@ abstract: |
 
   -   Generate inline code documentation using the GitHub Copilot Chat extension for Visual Studio Code.
 prerequisites: |
-  -   GitHub Copilot enabled on your account. For learning, the Copilot Free option with usage limits should sufficient.
-
-  -   A basic understanding of the features provided by the GitHub Copilot extensions for Visual Studio Code.
-
   -   One or more years of software development experience is recommended.
 
   -   Experience developing C# applications using Visual Studio Code and the C# Dev Kit extension is recommended.
+
+  -   An active subscription for GitHub Copilot is required for either your personal GitHub account or a GitHub account managed by an organization or enterprise. You can set up a GitHub Copilot Free account or sign up for a subscription to GitHub Copilot Pro trial with a one-time 30-day trial.  For learning, the Copilot Free option with usage limits should be sufficient.
+
+  -   Awareness of the GitHub Copilot free trial conditions: if you choose the free trial offer for GitHub Copilot, a form of payment is requested at sign-up. Charges aren't applied until the trial is over, unless you cancel before the conclusion of the 30-day period.
+
+  -   A basic understanding of the features provided by the GitHub Copilot extensions for Visual Studio Code.
+
 iconUrl: /training/achievements/generic-badge.svg
 levels:
 - intermediate