Edit requests of Slackの特定チャンネルで一定期間を過ぎた昔の投稿を定期的に削除する

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We released Markdown parser changes on February 24, 2022. There may be some unexpected appearance changes in this update, because this article was posted before the changes.
Please don't forget to check the preview before updating your article.
For more information on the changes, please read this article.