Update README.md

Author: tannerlinsley

README.md

@@ -11,8 +11,8 @@ Simple, immersive and interactive charts for React
 <a href="https://bundlephobia.com/result?p=react-charts" target="\_parent">
   <img alt="" src="https://badgen.net/bundlephobia/minzip/react-charts" />
 </a>
-<a href="https://spectrum.chat/react-charts">
-  <img alt="Join the community on Spectrum" src="https://withspectrum.github.io/badge/badge.svg" />
+<a href="https://discord.com/invite/WrRKjPJ" target="\_parent">
+  <img alt="" src="https://img.shields.io/badge/Discord-TanStack-%235865F2" />
 </a>
 <a href="https://github.com/react-charts/react-charts" target="\_parent">
   <img alt="" src="https://img.shields.io/github/stars/react-charts/react-charts.svg?style=social&label=Star" />