Add interactive discord badge
<img src="https://github.com/edgedb/edgedb/workflows/Tests/badge.svg?event=push&branch=master" />
</a>
<a href="https://github.com/edgedb/edgedb/blob/master/LICENSE">
- <img src="https://img.shields.io/badge/license-Apache%202.0-blue" />
+ <img alt="license" src="https://img.shields.io/badge/license-Apache%202.0-blue" />
+ </a>
+ <a href="https://discord.gg/umUueND6ag">
+ <img alt="discord" src="https://img.shields.io/discord/841451783728529451?color=5865F2&label=discord&logo=discord&logoColor=8a9095">
</a>
<br />
<br />
