Add link to docs to README.md
<p align="center">
<a href="https://discord.gg/CrUAFH3"><img alt="Discord Chat" src="https://img.shields.io/discord/771367133715628073"></a>
+ <a href="https://zellij.dev/documentation/"><img alt="Zellij documentation" src="https://img.shields.io/badge/zellij-documentation-fc0060"></a>
</p>
-
# What is this?
[Zellij](https://en.wikipedia.org/wiki/Zellij) is a workspace aimed at developers, ops-oriented people and anyone who loves the terminal.
