zcash-grant-system/backend/grant/templates/emails/milestone_paid.html

<p style="margin: 0 0 20px;">
  Hooray! <b>{{ args.amount }} ZEC</b> has been paid out for
  <a href="{{ args.proposal_milestones_url }}" target="_blank">
    {{ args.proposal.title }} - {{ args.proposal.current_milestone.title }}</a
  >! You can view the transaction below:
</p>

<p style="margin: 0 0 20px;">
  <a href="{{ args.tx_explorer_url }}" target="_blank" rel="nofollow noopener">
    {{ args.tx_explorer_url }}
  </a>
</p>