fix: Add Chromatic badge to introduction.md

Added a badge for Chromatic to the introduction section.

Author: abernier

docs/getting-started/introduction.mdx

@@ -12,6 +12,7 @@ nav: -1
 [![logo](../logo.jpg)](https://codesandbox.io/s/bfplr)
 
 [![Storybook](https://img.shields.io/static/v1?message=Storybook&style=flat&colorA=000000&colorB=000000&label=&logo=storybook&logoColor=ffffff)](https://drei.pmnd.rs/)
+[![](https://img.shields.io/badge/chromatic-171c23.svg?style=flat&colorA=000000&colorB=000000&logo=chromatic&logoColor=ffffff)](https://www.chromatic.com/library?appId=64a019f36ecd3751d0ada612&branch=master)
 [![Version](https://img.shields.io/npm/v/@react-three/drei?style=flat&colorA=000000&colorB=000000)](https://www.npmjs.com/package/@react-three/drei)
 [![Downloads](https://img.shields.io/npm/dt/@react-three/drei.svg?style=flat&colorA=000000&colorB=000000)](https://www.npmjs.com/package/@react-three/drei)
 [![Discord Shield](https://img.shields.io/discord/740090768164651008?style=flat&colorA=000000&colorB=000000&label=discord&logo=discord&logoColor=ffffff)](https://discord.com/channels/740090768164651008/741751532592038022)