chore(web): add link to test-story.ink on index page

Author: SorraTheOrc

web/index.html

@@ -43,6 +43,7 @@ <h1>GEngine Demo</h1>
     <p>The GitHub Pages static demo is available at:</p>
     <ul>
       <li><a href="./demo/">/demo/</a></li>
+      <li><a href="./stories/test-story.ink">/stories/test-story.ink</a></li>
     </ul>
     <p>If you reached this page from the repo root, use the link above to load the InkJS demo.</p>
   </div>