Add this code snippet to your front-page.php file, at the bottom of the utility_pro_homepage_setup() function to swap out any h4 headers for h2.

replace-widget-element.php

	// Hat tip to Gary Jones (@GaryJ) for providing the explanation 
	// on what was happening and the code on how to change it.
	
	add_filter( 'genesis_markup_entry-title_open', 'gmj_replace_widget_element' );
	add_filter( 'genesis_markup_widget-entry-title_close', 'gmj_replace_widget_element' );

	function gmj_replace_widget_element( $string ) {
		return str_replace( 'h4', 'h2', $string );
	}