Update 7-exercise.md

Update lab title.

Author: sherzyang

learn-pr/wwl-data-ai/fundamentals-generative-ai/includes/7-exercise.md

@@ -1,6 +1,6 @@
-Now let's explore generative AI with Microsoft Copilot.
+Now let's explore generative AI in the Azure AI Foundry portal.
 
 > [!NOTE]
-> This exercise requires a free Microsoft account (for example an *outlook.com*, *live.com*, or *hotmail.com* account), and the Microsoft Edge web browser. If you don't already have a Microsoft account, sign up for one at [https://signup.live.com](https://signup.live.com).
+> If you don't already have one, you can [sign up for an Azure subscription](https://azure.microsoft.com/free?azure-portal=true), which includes free credits for the first 30 days.
 
 [![Button to launch exercise.](../media/launch-exercise.png)](https://go.microsoft.com/fwlink/?linkid=2249955&azure-portal=true)