PUT
https://api.us.nylas.com/v3/grants/{grant_id}/templates/{template_id}Update a template
Updates the specified grant-level template.
Update template request
https://api.us.nylas.com/v3/grants/{grant_id}/templates/{template_id}Updates the specified grant-level template.
Update template request
"<p>Hello {{user.name}}, your booking has been confirmed.</p>"