Add new `approximate_user_authorization_count` to `AppInfo`

### Summary

A new attribute for `AppInfo` object is available and documented

### What is the feature request for?

The core library

### The Problem

https://github.com/discord/discord-api-docs/pull/7613

### The Ideal Solution

Implement the new attribute

### The Current Solution

_No response_

### Additional Context

_No response_