docs: fix typo (#1861)

Author: rannien

content/en/tutorials/1.creating-blog-with-nuxt-content.md

@@ -819,7 +819,7 @@ And of course we should link from our blog post to our new author page.
 
 ```html{}[components/Author.vue]
 <NuxtLink :to="`/blog/author/${author.name}`">
-  <img :src="author.img" />
+  <img :src="author.image" />
   <div>
     <h4>Author</h4>
     <p>{{ author.name }}</p>