Update 2025-06-16-2025-release.md

Author: ToruKurahashi

_news/2025-06-16-2025-release.md

@@ -1,7 +1,7 @@
 ---
 layout: news
 title: Ruby合宿2025の参加者募集開始
-date: 2025-06-16 00:00:00 +0900
+date: 2025-06-16 09:00:00 +0900
 hero_image: /image/banners/banner_contact.png
 hero_height: is-medium
 article: true