lastEditTime 字段名调整；修改algolia逻辑

lib/rss.js

@@ -46,7 +46,7 @@ export async function generateRss(posts) {
       link: `${BLOG.LINK}/${post.slug}`,
       description: post.summary,
       content: await createFeedContent(post),
-      date: new Date(post?.publishTime)
+      date: new Date(post?.publishDay)
     })
   }