code: function toggleShepherdModalClass(currentElement) {
    const shepherdModal = document.querySelector(`${classNames.modalTarget}`);
  
    if (shepherdModal) {
      shepherdModal.classList.remove(classNames.modalTarget);
    }
  
    currentElement.classList.add(classNames.modalTarget);
  }
docs: Remove any leftover modal target classes and add the modal target class to the currentElement
  @param {HTMLElement} currentElement The element for the current step