Update widget_article_feedback.htm

src/theme/dedebiz/widget_article_feedback.htm

@@ -10,7 +10,7 @@
 					<label for="iptUsername">会员名</label>
 					<input type="text" class="form-control" id="iptUsername">
 				</div>
-				<div class="col-md-6areaValidate" style="display:none">
+				<div class="col-md-6 areaValidate" style="display:none">
 					<label for="iptValidate">验证码</label>
 					<div class="input-group">
 						<input type="text" class="form-control text-uppercase" id="iptValidate">