Fixed url to DataSet docs

index.html

@@ -150,7 +150,7 @@
                 <a href="./docs/dataset"><img class="img-thumbnail"  src="./images/dataset.png" alt="DataSet docs" style="width: 240px;"></a>
                 <h2>DataSet</h2>
                 <p>Manage unstructured data using DataSet. Add, update, and remove data, and listen for changes in the data.</p>
-                <p><a class="btn btn-primary" href="./docs/dataset" role="button">View docs &raquo;</a></p>
+                <p><a class="btn btn-primary" href="./docs/data" role="button">View docs &raquo;</a></p>
             </div>
         </div><!-- /.col-lg-4 -->
     </div><!-- /.row -->