使用bootstrap CDN for Django时未出现导航栏

<!-- 引入Bootstrap的CSS文件 -->
<link rel="stylesheet" href="https://cdn.staticfile.org/twitter-bootstrap/5.0.1/css/bootstrap.min.css">

<!-- 引入Bootstrap的JavaScript文件，需在jQuery之后引入 -->
<script src="https://cdn.staticfile.org/jquery/3.6.0/jquery.min.js"></script>
<script src="https://cdn.staticfile.org/twitter-bootstrap/5.0.1/js/bootstrap.min.js"></script>

<nav class="navbar navbar-expand-lg navbar-light bg-light">
  <a class="navbar-brand" href="#">Logo</a>
  <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarNav" aria-controls="navbarNav" aria-expanded="false" aria-label="Toggle navigation">
    <span class="navbar-toggler-icon"></span>
  </button>
  <div class="collapse navbar-collapse" id="navbarNav">
    <ul class="navbar-nav">
      <li class="nav-item active">
        <a class="nav-link" href="#">Home</a>
      </li>
      <li class="nav-item">
        <a class="nav-link" href="#">About</a>
      </li>
      <li class="nav-item">
        <a class="nav-link" href="#">Services</a>
      </li>
      <li class="nav-item">
        <a class="nav-link" href="#">Contact</a>
      </li>
    </ul>
  </div>
</nav>