So I host a forum that has a fair expectation of privacy, and one problem that a participant raised concerns the emails that are sent out when someone requests notification of a follow-up post on a discussion that they are subscribed to. The email includes the text of the post, which is not ideal. I tried hand-editing the flarum-subscriptions/email/new-post key in vendor/flarum/subscriptions/locale/en.yml, but that didn't work because I don't know how to make the forum regenerate the template. But obviously editing stuff in vendor/ is a stupid idea! How do I do it properly? I want to make the forum work exactly as it already does except for this one change to one email template. What's the approved method for such a change?