chore: add 2nd author example

data/blog/guide-to-using-images-in-nextjs.mdx

@@ -4,6 +4,7 @@ date: '2020-11-11'
 tags: ['next js', 'guide']
 draft: false
 summary: 'In this article we introduce adding images in the tailwind starter blog and the benefits and limitations of the next/image component.'
+author: sparrowhawk
 ---
 
 # Introduction