Changing Author Box Title markup in Genesis. http://sridharkatakam.com/change-author-box-title-markup-genesis/

functions.php

add_filter( 'genesis_author_box', 'sk_author_box' );
function sk_author_box() {

	// Author's Gravatar image
	$gravatar_size = apply_filters( 'genesis_author_box_gravatar_size', 70, $context );
	$gravatar      = get_avatar( get_the_author_meta( 'email' ), $gravatar_size );

	// Author's name
	$name = get_the_author();
	$title = get_the_author_meta( 'title' );
	if( !empty( $title ) )
		$name .= ', ' . $title;

	// Author's Biographical info
	$description   = wpautop( get_the_author_meta( 'description' ) );

	// Build Author box output
	$output = '';
	$output .= '<section class="author-box" itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author">';
	$output .= $gravatar;
	$output .= '<div class="author-box-title">About <span itemprop="name">' . $name .'</span></div>';
	$output .= '<div itemprop="description" class="author-box-content">' . $description . '</div>';
	$output .= '</section>';
	return $output;

}