fix: 当B站动态正文内容不含emoji时, 正文内容会被错误的清空 (#5021)

lib/routes/bilibili/dynamic.js

@@ -151,7 +151,7 @@ module.exports = async (ctx) => {
 
             return {
                 title: getTitle(data),
-                description: `${data_content}${
+                description: `${data_content || getDes(data)}${
                     origin && getOriginName(origin) ? `<br><br>//转发自: @${getOriginName(origin)}: ${getOriginTitle(origin.item || origin)}${getDes(origin.item || origin)}` : `${getOriginDes(origin)}`
                 }${getIframe(data)}${getIframe(origin)}${imgHTML ? `<br>${imgHTML}` : ''}`,
                 pubDate: new Date(item.desc.timestamp * 1000).toUTCString(),