JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://code.jquery.com/jquery-3.4.1.slim.js"></script>
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.css">
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.16.0/umd/popper.js"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/js/bootstrap.js"></script>
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.css">
<!-- 
  Bootstrap docs: https://getbootstrap.com/docs
-->
<div class="container mt-5">

  <div class="card mb-5">
    <div class="card-body">
      <p>Paragraph One</p>
      <p>This paragraph has a default margin-bottom. It shouldn't!</p>
    </div>
  </div>

  <div id="bugfix-card" class="card">
    <div class="card-body">
      <p>Paragraph One</p>
      <p>This paragraph is as it should be</p>
    </div>
  </div>

</div>

CSS

#bugfix-card p:last-child {
  margin-bottom: 0;
}