act on feedback

Author: isidorn

api/extension-guides/chat.md

@@ -34,7 +34,7 @@ Participants can also contribute *commands*, which are a shorthand notation for
 
 ## Extending GitHub Copilot via GitHub Apps
 
-Alternatively, it is possible to extend GitHub Copilot by creating a GitHub App that contributes a chat participant in the Chat view. A GitHub App is backed by a service and works across all GitHub Copilot surfaces, such as github.com, Visual Studio, or VS Code. On the other hand, GitHub Apps do not have full access to the VS Code API. To learn more about extending GitHub Copilot through a GitHub App see the [official GitHub documentation](https://docs.github.com/en/copilot/building-copilot-extensions/about-building-copilot-extensions).
+Alternatively, it is possible to extend GitHub Copilot by creating a GitHub App that contributes a chat participant in the Chat view. A GitHub App is backed by a service and works across all GitHub Copilot surfaces, such as github.com, Visual Studio, or VS Code. On the other hand, GitHub Apps do not have full access to the VS Code API. To learn more about extending GitHub Copilot through a GitHub App see the [GitHub documentation](https://docs.github.com/en/copilot/building-copilot-extensions/about-building-copilot-extensions).
 
 
 ## Links