<!-- here will appear eventual js code and other additions to the footer -->
<div id="backtotop">
- <a href="#top"><i class="fa-solid fa-chevron-up"></i><span class="screen-reader-text">back to top</span></a>
+ <a href="#top"><i class="fa-brands fa-caret-up"></i><span class="screen-reader-text">back to top</span></a>
</div>