[DOCUMENTATION] Invalid token issue in set-up-app-registrations.md

This is with regards to [setup app registrations manually](https://github.com/Azure-Samples/communication-services-authentication-hero-csharp/blob/main/docs/deployment-guides/set-up-app-registrations.md)

I have followed the steps but still unable to run the application locally.

After following the steps, I understand that the server secret value needs to be updated in appsettings.json, but where should I update the client side secret value. I am not able to get token for ACS. I get the following error

**The audience 'api://' is invalid.**

Here's the snapshot :