docs: Add link to github repo

Author: gadenbuie

docs/index.html

@@ -134,8 +134,8 @@
               </a>
             </div>
 
-            Both packages offer the same powerful functionality with language-specific implementations. Check out our
-            documentation for installation guides, examples, and API references!
+            <p>Both packages offer the same powerful functionality with language-specific implementations. Check out our
+            documentation for installation guides, examples, and API references!</p>
           </div>
         </div>
       </div>
@@ -156,11 +156,11 @@ <h4>Easy Integration</h4>
       </div>
       <div class="feature">
         <div class="feature-icon">
-          <i class="fas fa-palette"></i>
+          <i class="fa-brands fa-github fa-lg"></i>
         </div>
         <div class="feature-content">
-          <h4>Customizable UI</h4>
-          <p>Style your chat interface to match your app's design with flexible theming options.</p>
+          <h4>Open Source</h4>
+          <p>View the source code, ask questions or report an issue at <a href="https://github.com/posit-dev/shinychat">posit-dev/shinychat</a>.</p>
         </div>
       </div>
       <div class="feature">