fix: add missing author field in github and gitlab routes. (#5698)

lib/routes/github/pulls.js

@@ -33,6 +33,7 @@ module.exports = async (ctx) => {
         link: host,
         item: data.map((item) => ({
             title: item.title,
+            author: item.user.login,
             description: item.body ? md.render(item.body) : 'No description',
             pubDate: new Date(item.created_at).toUTCString(),
             link: `${link}/${item.number}`,