fix: remove redundant authors ld+json field

contentlayer.config.ts

@@ -87,7 +87,7 @@ export const Blog = defineDocumentType(() => ({
     draft: { type: 'boolean' },
     summary: { type: 'string' },
     images: { type: 'json' },
-    authors: { type: 'json' },
+    authors: { type: 'list', of: { type: 'string' } },
     layout: { type: 'string' },
     bibliography: { type: 'string' },
     canonicalUrl: { type: 'string' },
@@ -105,7 +105,6 @@ export const Blog = defineDocumentType(() => ({
         description: doc.summary,
         image: doc.images ? doc.images[0] : siteMetadata.socialBanner,
         url: `${siteMetadata.siteUrl}/${doc._raw.flattenedPath}`,
-        author: doc.authors,
       }),
     },
   },