Fix: Use correct class for Liberapay <div>

Author: orudge

pages/donate.html

@@ -26,7 +26,7 @@ <h3>Donate to OpenTTD</h3>
                 </li>
                 <li>
                     <div class="header">Liberapay</div>
-                    <div class="contents">
+                    <div class="content">
                         <a href="https://liberapay.com/OpenTTD">Liberapay</a> allows you to make one-off or recurring donations by credit or debit card, SEPA Direct Debit, or PayPal. If you'd like to set up a weekly, monthly or annual donation, Liberapay is the easiest way to do so. Donations accepted in over 30 different currencies.
                     </div>
                 </li>