Fix typo in GitHub link on community page (#6606)

fixes #6587

Co-authored-by: Mark Cowlishaw <markcowl@microsoft.com>

Author: Brijeshthummar02

website/src/pages/community.astro

@@ -30,7 +30,7 @@ import BaseLayout from "../layouts/base-layout.astro";
     <h2 style="color: #4A90E2;">Discussion</h2>
     <p>
       Ask questions on <a href="https://github.com/microsoft/typespec/discussions"
-        >Github Discussion</a
+        >GitHub Discussion</a
       >.
     </p>
   </div>