feat: support multi-author blog post

data/blog/introducing-tailwind-nextjs-starter-blog.mdx

@@ -6,6 +6,7 @@ tags: ['next-js', 'tailwind', 'guide']
 draft: false
 summary: 'Looking for a performant, out of the box template, with all the best in web technology to support your blogging needs? Checkout the Tailwind Nextjs Starter Blog template.'
 images: ['/static/images/canada/mountains.jpg', '/static/images/canada/toronto.jpg']
+authors: ['default', 'sparrowhawk']
 ---
 
 ![tailwind-nextjs-banner](/static/images/twitter-card.png)