fix(route): 增加BBC和微信（feeddd获取）的favicon (#10649)

* Update index.js

* Update feeddd.js

lib/routes/bbc/index.js

@@ -85,6 +85,7 @@ module.exports = async (ctx) => {
     ctx.state.data = {
         title,
         link,
+        image: 'https://www.bbc.com/favicon.ico',
         description: title,
         item: items,
     };

lib/v2/wechat/feeddd.js

@@ -31,6 +31,7 @@ module.exports = async (ctx) => {
     ctx.state.json = {
         title: response.data.title,
         link: response.data.feed_url,
+        image: 'https://mp.weixin.qq.com/favicon.ico',
         description: response.data.title,
         item: items,
     };