title: Add a custom button for a specific product category in Woocommerce
body: <p>I want to display an additional button below the description to a specific product category: "bracelets"
  so I developed a piece of code, which does not work:</p>
  
  <pre><code>add_action( 'woocommerce_single_product_summary', 'my_extra_button_on_product_page', 30 );
  
  function my_extra_button_on_product_page() {
     if ( is_product_category('bracelets')) {
       global $product;
       echo '&lt;a href="www.test.com"&gt;Extra Button&lt;/a&gt;';
     }
  }
  </code></pre>
  
  <p>Any idea about what's wrong here?</p>