How to add data attribute to wordpress container?

Question

HTML

How to add via wordpress data attribute

<nav class="main-nav" data-aos="fade-down">
        <ul class="main-nav__list list">
            <li class="main-nav__item">текст</li>
            <li class="main-nav__item">текст</li>
            <li class="main-nav__item">текст</li>
            <li class="main-nav__item">текст</li>
            <li class="main-nav__item">текст</li>
        </ul>
    </nav>

Add exactly to container, container in my wp - nav.