Feature: Add documentation for PATCH-ing Members

[WinterPhoenix]

There's no documentation on how to update members, for example adding a Creator Note (member.note) programmatically. I had to discover the method using Browser Dev Tools from my Creator Dashboard.

Come on guys, you run the most popular membership platform in the world. This sort of friction is what causes new creators interested in tight app integration, like myself, to skip Patreon entirely.