Modify shop loop item title markup

functions.php

<?php
// first unhook the title.
remove_action( 'woocommerce_shop_loop_item_title', 'woocommerce_template_loop_product_title' );
// then hook your own.
add_action( 'woocommerce_shop_loop_item_title', 'pp_custom_title', 30 );

/**
 * Modify the template loop title markup
 *
 * @return void
 */
function pp_custom_title() {
	$tag = 'p';
	echo '<' . esc_html( $tag ) . ' class="woocommerce-loop-product__title"><a href="' . esc_url( get_permalink() ) . '">' . get_the_title() . '</a></' . esc_html( $tag ) . '>';
}