Fix another broken docs link

Author: henrycatalinismith

docs/_includes/tip.html

@@ -25,7 +25,7 @@ <h2>
         to the core documentation, under your own name and with an attribution
         link? If you've got what it takes, just write it up and <a
         href="mailto:[email protected]">email me</a>, or better still, <a
-        href="https://github.com/henrycatalinismith/ppladdressbook.org">send a pull
+        href="https://github.com/henrycatalinismith/ppl">send a pull
         request</a>!
       </p>
     </div>