message: chore(website): remove opencollective link
diff: {% include layouts/svg/github.svg %} GitHub
  </a>
  </li>
  - <li>
  - <a href="https://opencollective.com/rometools">
  - {% include layouts/svg/open-collective.svg %} Open Collective
  - </a>
  - </li>
  <li>
  <a href="https://discord.gg/rome">
  {% include layouts/svg/discord.svg %} Discord
  