Add Spectrum chat link

Author: AryanJ-NYC

src/pages/index.mdx

@@ -14,43 +14,11 @@ import SEO from '../components/Seo';
 Coming soon: React and TypeScript documentation!
 
 <MailingListForm />
-<p>
-  Visit the{' '}
-  <a
-    href="https://github.com/AryanJ-NYC/reactandtypescript.dev"
-    target="_blank"
-    rel="noopener noreferrer"
-  >
-    GitHub repository
-  </a>{' '}
-  to contribute!
-</p>
-<p>
-  If you're looking for immediate React and TypeScript help, please visit{' '}
-  <a
-    href="https://twitter.com/swyx"
-    target="_blank"
-    rel="noopener noreferrer"
-  >
-    @swyx
-  </a>
-  's{' '}
-  <a
-    href="https://github.com/sw-yx/react-typescript-cheatsheet"
-    target="_blank"
-    rel="noopener noreferrer"
-  >
-    React TypeScript cheatsheet.
-  </a>
-</p>
-<p>
-  Lastly, tweet me at{' '}
-  <a
-    href="https://twitter.com/AryanJabbari"
-    target="_blank"
-    rel="noopener noreferrer"
-  >
-    @AryanJabbari
-  </a>
-  . Words of encouragement are always welcome!
-</p>
+
+Visit the [GitHub repository](https://github.com/AryanJ-NYC/reactandtypescript.dev) to contribute!
+
+For questions that are not covered in the documentation or to chat about React + TypeScript, join our [Spectrum Chat](https://spectrum.chat/react-and-typescript).
+
+A special thank you to [@swyx](https://twitter.com/swyx)'s [React TypeScript cheatsheet](https://github.com/sw-yx/react-typescript-cheatsheet).
+
+Lastly, tweet me at [@AryanJabbari](https://twitter.com/AryanJabbari). Words of encouragement are always welcome!