Fix typo for panel cursor

Author: pickfire

util/gh-pages/index.html

@@ -14,7 +14,7 @@
 
         .form-inline .checkbox { margin-right: 0.6em }
 
-        .panel-heading { pointer: cursor; }
+        .panel-heading { cursor: pointer; }
         .panel-heading:hover { background-color: #eee; }
 
         .panel-title { display: flex; }