poky/bitbake/doc/_templates/footer.html

<footer>
  <hr/>
  <div role="contentinfo">
    <p>&copy; Copyright {{ copyright }}
       <br>Last updated on {{ last_updated }} from the <a href="https://git.openembedded.org/bitbake/">bitbake</a> git repository.
    </p>
  </div>
</footer>