Change title slide HTML tag ?

[cderv]

Currently we are using headers

revealjs/inst/rmarkdown/templates/revealjs_presentation/resources/default.html

Lines 538 to 550 in cc46ea0

	<h1 class="title">$title$</h1>
	$if(subtitle)$
	<h1 class="subtitle">$subtitle$</h1>
	$endif$
	$for(author)$
	<h2 class="author">$author$</h2>
	$endfor$
	$for(institute)$
	<h3 class="institute">$institute$</h2>
	$endfor$
	$if(date)$
	<h3 class="date">$date$</h3>
	$endif$

It would be maybe better to use h1 only for the title then usual <p> tag.
This would align with Pandoc's template

However, this change could break already existing custom style maybe ?