Bump actionmailer from 6.1.7.8 to 6.1.7.9#1638

yasulab merged 1 commit intomaincoderdojo-japan/coderdojo.jp:mainfrom

dependabot/bundler/actionmailer-6.1.7.9coderdojo-japan/coderdojo.jp:dependabot/bundler/actionmailer-6.1.7.9Copy head branch name to clipboard