Add donations.html link

index.html

@@ -26,6 +26,7 @@
 
 <p>
 You can also contact us on the irc channel <a href="irc://chat.freenode.net/#youtube-dl">#youtube-dl</a>(<a href="http://webchat.freenode.net/?randomnick=1&amp;channels=youtube-dl">webchat</a>) on freenode.
+If you like this project, you may <a href="donations.html">donate here</a>.
 </p>
 
 <div class="note">