feat: wrapped article with <article> element

src/pages/blog/[...slug].astro

@@ -49,6 +49,7 @@ const cover = customFeaturedImage || matchedImage_src?.src || firstImageURL || `
   ogImage={cover}
   author={authorInfo.map((a: any) => a.name).join(', ')}
 >
+    <article>
         <h1 class="title">{entry.data.title}</h1>
             {authorInfo.map((a: any) => <AuthorInfo data={a} />)}
         <span class="date">{new Date(entry.data.pubDate).toISOString().split('T')[0]}</span>
@@ -68,6 +69,7 @@ const cover = customFeaturedImage || matchedImage_src?.src || firstImageURL || `
                 import "katex/dist/contrib/copy-tex.js"
             </script>
         }
+    </article>
   </div>
 </Layout>
 <style>