add kansai-ben self-study link

index.html

@@ -72,6 +72,8 @@ <h2 id="tips">Tips</h2>
           <li style="padding-bottom:8px;padding-top:2px;">All sections are collapsed by default, but you can use the button below if you want to display all entries at once.</li>
         </ul>
 
+        <p>For additional Kansai-ben resources, please check out the <a href="https://www.kansaiben.com/" target="_blank">Kansai-ben Self-study Site</a>.</p>
+
         <div id="check-answers" class="center"><button class="button" onclick="GenkiSettings.manager(); return false;"><i class="fa">&#xf013;</i>Site Settings</button><button class="button" onclick="CKJDict.toggleAll(this);"><i class="fa">&#xf07c;</i>Show All Entries</button><button class="button furigana-toggler" onclick="Genki.toggle.furigana(this);"><i class="fa">&#xf2a8;</i>Furigana: <span class="furigana-show">OFF</span><span class="furigana-hide">ON</span></button></div>
 
         <div id="quick-actions" class="columns-2 clear">