Change link from twitter to mastodon (fnordon).

wwwroot/index.php

@@ -108,7 +108,7 @@ $vollmond=(abs($datum-time())<43200);
 <?php } else { ?>
 <div class="main">
 <p class="answer no">Nein</p>
-<p class="subanswer">Einfach nur so #<a href="https://twitter.com/search?q=%23allebekloppt">allebekloppt</a>.</p>
+<p class="subanswer">Einfach nur so #<a href="https://fnordon.de/tags/allebekloppt">allebekloppt</a>.</p>
 </div>
 <?php } ?>
 <div class="footer">