fix(route): fix xiaoyuzhou podcast smallPicUrl issue (#9218)

lib/v2/xiaoyuzhou/maintainer.js

@@ -1,4 +1,4 @@
 module.exports = {
     '/': ['prnake', 'Maecenas'],
-    '/podcast/:id': ['hondajojo'],
+    '/podcast/:id': ['hondajojo', 'jtsang4'],
 };

lib/v2/xiaoyuzhou/podcast.js

@@ -21,7 +21,7 @@ module.exports = async (ctx) => {
         link: `https://www.xiaoyuzhoufm.com/episode/${item.eid}`,
         pubDate: parseDate(item.pubDate),
         description: item.shownotes,
-        itunes_item_image: item.image.smallPicUrl,
+        itunes_item_image: (item.image || item.podcast?.image)?.smallPicUrl,
     }));
 
     ctx.state.data = {