title: Send on-hold order status email notification to admin
body: <p>I want the admin to receive <strong>on hold</strong> order notification as well in WooCommerce. Right now, only customers get that notification.</p>
  
  <p>I have tried the following codes but it doesn't seem to work. </p>
  
  <p>Here is my code:</p>
  
  <pre><code>add_filter( 'woocommerce_email_headers', 'mycustom_headers_filter_function', 10, 2);
  function mycustom_headers_filter_function( $headers, $object ) {
      if ($object == 'customer_on_hold_order') {
          $headers .= 'BCC: My name &lt;my@email.com&gt;' . "\r\n";
      }
      return $headers;
  }
  </code></pre>
  
  <p>What should be the correct filter/hook to use?</p>
  
  <p>Thanks</p>