PixivResolverの取得画像をregularにする

app/MetadataResolver/PixivResolver.php

@@ -64,7 +64,7 @@ class PixivResolver implements Resolver
 
             $metadata->title = $json['body']['illustTitle'] ?? '';
             $metadata->description = '投稿者: ' . $json['body']['userName'] . PHP_EOL . strip_tags(str_replace('<br />', PHP_EOL, $json['body']['illustComment'] ?? ''));
-            $metadata->image = $this->proxize($json['body']['urls']['original'] ?? '');
+            $metadata->image = $this->proxize($json['body']['urls']['regular'] ?? '');
 
             // ページ数の指定がある場合は画像URLをそのページにする
             if ($page != 0) {