lastEditTime 字段名调整；修改algolia逻辑

lib/sitemap.xml.js

@@ -26,7 +26,7 @@ export async function generateSitemapXml({ allPages }) {
     const slugWithoutLeadingSlash = post?.slug?.startsWith('/') ? post?.slug?.slice(1) : post.slug
     urls.push({
       loc: `${BLOG.LINK}/${slugWithoutLeadingSlash}`,
-      lastmod: new Date(post?.publishTime).toISOString().split('T')[0],
+      lastmod: new Date(post?.publishDay).toISOString().split('T')[0],
       changefreq: 'daily'
     })
   })