woocommerce_product_get_rating_html.php

<?php
/**
 * Hook: woocommerce_product_get_rating_html.
 * Modify the HTML for the product rating.
 */
function plugin_republic_product_get_rating_html( $html, $rating, $count ) {
  // Modify the $html here
  return $html;
}
add_filter( 'woocommerce_product_get_rating_html', 'plugin_republic_product_get_rating_html', 10, 3 );