docs: update Azure Free link

README.md

@@ -81,7 +81,7 @@ The application is made from multiple components, including:
 
 **IMPORTANT:** In order to deploy and run this sample, you'll need:
 
-- **Azure account**. If you're new to Azure, [get an Azure account for free](https://learn.microsoft.com/azure/search/search-what-is-azure-search) to get free Azure credits to get started.
+- **Azure account**. If you're new to Azure, [get an Azure account for free](https://azure.microsoft.com/free) to get free Azure credits to get started.
 - **Azure subscription with access enabled for the Azure OpenAI service**. You can request access with [this form](https://aka.ms/oaiapply).
 - **Azure account permissions**:
   - Your Azure account must have `Microsoft.Authorization/roleAssignments/write` permissions, such as [Role Based Access Control Administrator](https://learn.microsoft.com/azure/role-based-access-control/built-in-roles#role-based-access-control-administrator-preview), [User Access Administrator](https://learn.microsoft.com/azure/role-based-access-control/built-in-roles#user-access-administrator), or [Owner](https://learn.microsoft.com/azure/role-based-access-control/built-in-roles#owner). If you don't have subscription-level permissions, they must be granted to you with [RBAC](https://learn.microsoft.com/azure/role-based-access-control/built-in-roles#role-based-access-control-administrator-preview) for an existing resource group and [deploy to that existing group](#existing-resource-group).