逛rss订阅输出lastbuilddate修改为UTC格式

@@ -20,7 +20,7 @@ const index = (req, res, next) => {
 	return rssModel.getRssArticle(gender).then((result) => {
 		return res.render('rss/index', {
 			layout: false,
-			time: '',
+			time: (new Date()).toUTCString(),
 			items: result
 		})
 	});