fix azure portal url, fixes #8247 (#8248)

Author: josefaidt

src/pages/[platform]/build-a-backend/auth/examples/microsoft-entra-id-saml/index.mdx

@@ -111,7 +111,7 @@ Deploy to your personal cloud sandbox with `npx ampx sandbox`. This will generat
 
 ## Set up Microsoft Entra ID
 
-Next, navigate to [portal.amazon.com](https://portal.azure.com/), select **Entra ID**. In your default directory, or company's existing directory, under **Manage**, select **Enterprise Applications**
+Next, navigate to [portal.azure.com](https://portal.azure.com/), select **Entra ID**. In your default directory, or company's existing directory, under **Manage**, select **Enterprise Applications**
 
 ![Entra ID default directory page highlighting Enterprise Applications](/images/auth/examples/microsoft-entra-id-saml/entra-id-select-enterprise-applications.png)