message: ledger: add credits for the 280-char code
diff: <ul class="settings-contributors">
  <li>
  <a href="https://github.com/no-boot-device" target="_blank">no-boot-device</a>
  - <small>That Old Replies Trick</small>
  + <small>That Old Replies Trick using deciders</small>
  + </li>
  + <li>
  + <a href="https://github.com/Zemnmez/" target="_blank">Zemnmez</a>
  + <small>Base for the 280-characters limit code</small>
  </li>
  </ul>
  