Update getting started in Copilot Overview

Author: ntrogh

docs/copilot/overview.md

@@ -58,11 +58,9 @@ GitHub Copilot can provide assistance in a variety of scenarios.
 
 ## Getting started
 
-1. Install the GitHub Copilot extensions.
+1. Select **Use AI Features with Copilot for Free...** from the Copilot menu in the VS Code title bar
 
-    > <a class="install-extension-btn" href="vscode:extension/GitHub.copilot?referrer=docs-copilot-overview">Install the GitHub Copilot extensions</a>
-
-1. Sign in with your GitHub account to use Copilot.
+1. Sign in with your GitHub account to use Copilot
 
     > [!TIP]
     > You can get started for free with the [Copilot Free plan](https://github.com/github-copilot/signup) if you don't yet have a Copilot subscription. Follow the steps in the [setup guide](/docs/copilot/setup.md) to set up a Copilot subscription.