use blog.json instead of blog/list.json

test/app/routes/blog.json.js

@@ -1,4 +1,4 @@
-import posts from './_posts.js';
+import posts from './blog/_posts.js';
 
 const contents = JSON.stringify(posts.map(post => {
 	return {

test/app/routes/blog/index.html

@@ -32,7 +32,7 @@
 		},
 
 		preload({ params, query }) {
-			return fetch(`/blog/list.json`).then(r => r.json()).then(posts => {
+			return fetch(`/blog.json`).then(r => r.json()).then(posts => {
 				return { posts };
 			});
 		}