[YQTemplate] added enctype to form

yqform.etlua

@@ -8,7 +8,7 @@
     <pre>
       <%=data%>
     </pre>
-    <form method="POST" action="/cgi/yqtemplate">
+    <form method="POST" action="/cgi/yqtemplate" enctype="multipart/form-data">
       <input type="test" name="name" value="name" />
       <input type="file" name="avatar" value="avatar" />
       <input type="checkbox" name="isLeader" value="isLeader" />