[html] Correct Semantic tag for copyright info - html5

it is better to include it in a <small> tag The HTML <small> tag is used for specifying small print.

Small print (also referred to as "fine print" or "mouseprint") usually refers to the part of a document that contains disclaimers, caveats, or legal restrictions, such as copyrights. And this tag is supported in all major browsers.

<footer>
 <small>&copy; Copyright 2058, Example Corporation</small>
</footer>