Instructions for creating authors are not complete

[georgik]

The documnet https://developer.espressif.com/pages/contribution-guide/content-writing-workflow/#add-youself-as-an-author is not accurate. It does not explain expected content of index.md.

The minimal version should be:

---
title: Juraj Michálek
---

The problem is that if you put there just name: instead of title, then the user name won't be visible at Authors page.