投稿一覧の .c-entry-summary__titleを h2 に変更

change-c-entry-summary__title-to-h2.php

<?php
/**
 * 投稿一覧の .c-entry-summary__titleを h2 に変更
 *
 * @param string $args 文字列.
 */
add_filter(
	'snow_monkey_get_template_part_args_template-parts/loop/entry-summary/title/title',
	function ( $args ) {
		$args['vars']['_title_tag'] = 'h2';
		return $args;
	}
);