add button to woocommerce category

functions.php

function gg_cat_btn() {
 if( is_tax( 'product_cat' ) ) {
  add_action( 'woocommerce_after_shop_loop_item_title', 'gg_readmore_btn' );
 }
}
add_filter( 'woocommerce_after_shop_loop_item', 'gg_cat_btn' );

function gg_readmore_btn() {
 echo '<a class="cat-btn" href="'.get_permalink().'">'.__( 'Book / Get quote!', 'your-plugin' ).'</a>';
}