Change skiplinks heading tag from h2 to h1 in Genesis

functions.php

remove_action ( 'genesis_before_header', 'genesis_skip_links', 5 );
add_action ( 'genesis_before_header', 'sk_skip_links', 5 );
/**
 * Add skiplinks for screen readers and keyboard navigation
 *
 * @since  2.2.0
 */
function sk_skip_links() {

	if ( ! genesis_a11y( 'skip-links' ) ) {
		return;
	}

	// Call function to add IDs to the markup
	genesis_skiplinks_markup();

	// Determine which skip links are needed
	$links = array();

	if ( genesis_nav_menu_supported( 'primary' ) && has_nav_menu( 'primary' ) ) {
		$links['genesis-nav-primary'] =  __( 'Skip to primary navigation', 'genesis' );
	}

	$links['genesis-content'] = __( 'Skip to content', 'genesis' );

	if ( 'full-width-content' != genesis_site_layout() ) {
		$links['genesis-sidebar-primary'] = __( 'Skip to primary sidebar', 'genesis' );
	}

	if ( in_array( genesis_site_layout(), array( 'sidebar-sidebar-content', 'sidebar-content-sidebar', 'content-sidebar-sidebar' ) ) ) {
		$links['genesis-sidebar-secondary'] = __( 'Skip to secondary sidebar', 'genesis' );
	}

	if ( current_theme_supports( 'genesis-footer-widgets' ) ) {
		$footer_widgets = get_theme_support( 'genesis-footer-widgets' );
		if ( isset( $footer_widgets[0] ) && is_numeric( $footer_widgets[0] ) ) {
			if ( is_active_sidebar( 'footer-1' ) ) {
				$links['genesis-footer-widgets'] = __( 'Skip to footer', 'genesis' );
			}
		}
	}

	 /**
	 * Filter the skip links.
	 *
	 * @since 2.2.0
	 *
	 * @param array $links {
	 *     Default skiplinks.
	 *
	 *     @type string HTML ID attribute value to link to.
	 *     @type string Anchor text.
	 * }
	 */
	$links = apply_filters( 'genesis_skip_links_output', $links );

	// write HTML, skiplinks in a list with a heading
	$skiplinks  =  '<section>';
	$skiplinks .=  '<h1 class="screen-reader-text">'. __( 'Skip links', 'genesis' ) .'</h1>';
	$skiplinks .=  '<ul class="genesis-skip-link">';

	// Add markup for each skiplink
	foreach ($links as $key => $value) {
		$skiplinks .=  '<li><a href="' . esc_url( '#' . $key ) . '" class="screen-reader-shortcut"> ' . $value . '</a></li>';
	}

	$skiplinks .=  '</ul>';
	$skiplinks .=  '</section>' . "\n";

	echo $skiplinks;
}

Might be worth removing the heading from skiplinks in core. Since they're at the top of the page with the exception of the page title itself in some screen reader/browser combinations, I think the likelihood that someone would call up the list of headings to find the skiplinks is small.