feat: make title h1

src/components/article.astro

@@ -10,7 +10,7 @@ export interface Props {
 
 {
 article ? (
-    <h2>{article.title}</h2>
+    <h1>{article.title}</h1>
     <p>by <em>{article.author}</em></p>
     <span set:html={article.content} />
     ) : ''