联动 #2215

https://github.com/DIYgod/RSSHub/blob/master/lib/routes/xiaoheihe/discount.js

建议：

• 把 link 和 guid 换成 https://store.steampowered.com/app/%gameid%/?l=zh&cc=cn
• description 里添加头图 <img src="https://steamcdn-a.akamaihd.net/steam/apps/%gameid%/header.jpg" />
• pubDate 怎么是截止日期 😅 删掉然后添加到 description 里？
• API 里有 lowest_discount，如果 discount == lowest_discount 可以在 title 加上「史低」……
• API 换成网页版，并添加游戏描述: https://api.xiaoheihe.cn/game/web/all_recommend/games/?show_type=discount&limit=20&offset=0&os_type=web&version=999.0.0