fix: "コンポーネントの基本"の原文との差異及び誤りの修正 (#187)

Author: yaegassy

src/guide/component-basics.md

@@ -190,8 +190,12 @@ const App = {
 
 ```html
 <div id="blog-posts-events-demo">
-  <div v-bind:style="{ fontSize: postFontSize + 'em' }">
-    <blog-post v-for="post in posts" :key="post.id" :title="title"></blog-post>
+  <div :style="{ fontSize: postFontSize + 'em' }">
+    <blog-post
+      v-for="post in posts"
+      :key="post.id"
+      :title="post.title"
+    ></blog-post>
   </div>
 </div>
 ```