bootstrap 4 offcanvas媒体标题

Question

我尝试将标题添加到bootstrap 4 offcanvas媒体中，但是它不在新行中，我尝试了很多解决方案，但所有方法均无效

    <div class="media text-muted pt-3">
       <img data-src="holder.js/32x32?theme=thumb&bg=007bff&fg=007bff&size=1" alt="" class="mr-2 rounded">

          <p class="media-body pb-3 mb-0 small lh-125 border-bottom border-gray">
            <h5 class="mt-0"><a href="#">Donec id elit non mi porta gravida at eget metus?</a></h5>
            Donec id elit non mi porta gravida at eget metus. Fusce dapibus, tellus ac cursus commodo, tortor mauris condimentum nibh, ut fermentum massa justo sit amet risus.

   </p>
 </div>