add missing Jump to: top in thanks-for-help.md

thanks-for-help.html

@@ -5312,6 +5312,7 @@ image of <a href="2024/endoh1/endoh1-1024.png">1024x1024 image</a>.</p>
 <li>Home Page: <a href="https://iki.fi/bisqwit/">https://iki.fi/bisqwit/</a></li>
 <li>YouTube: <a href="https://youtube.com/c/Bisqwit">https://youtube.com/c/Bisqwit</a></li>
 </ul>
+<p>Jump to: <a href="#">top</a></p>
 <div id="neglect">
 <h2 id="did-we-neglect-to-credit-you">Did we neglect to credit you?</h2>
 </div>