按照教程写得代码，为什么我登录后头像不在顶部右侧而是在左侧？

这是我的_header.blade.php

<nav class="navbar navbar-expand-lg navbar-light bg-light navbar-static-top">
  <div class="container">
    <!-- Branding Image -->
    <a class="navbar-brand " href="{{ url('/') }}">
      Laravel Shop
    </a>
    <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
      <span class="navbar-toggler-icon"></span>
    </button>

    <div class="collapse navbar-collapse" id="navbarSupportedContent">
      <!-- Left Side Of Navbar -->
      <ul class="navbar-nav mr-auto">

      </ul>

      <!-- Right Side Of Navbar -->
      <ul class="navbar-nav navbar-right">
        <!-- 登录注册链接开始 -->
        @guest
          <li class="nav-item"><a class="nav-link" href="{{ route('login') }}">登录</a></li>
          <li class="nav-item"><a class="nav-link" href="{{ route('register') }}">注册</a></li>
        @else
          <li class="nav-item dropdown">
            <a class="nav-link dropdown-toggle" href="#" id="navbarDropdown" role="button" data-bs-toggle="dropdown"
               aria-haspopup="true" aria-expanded="false">
              <img src="https://cdn.learnku.com/uploads/images/201709/20/1/PtDKbASVcz.png?imageView2/1/w/60/h/60" class="img-responsive img-circle" width="30px" height="30px">
              {{ Auth::user()->name }}
            </a>
            <div class="dropdown-menu" aria-labelledby="navbarDropdown">
              <a class="dropdown-item" id="logout" href="#"
                 onclick="event.preventDefault();document.getElementById('logout-form').submit();">退出登录</a>
              <form id="logout-form" action="{{ route('logout') }}" method="POST" style="display: none;">
                {{ csrf_field() }}
              </form>
            </div>
          </li>
      @endguest
      <!-- 登录注册链接结束 -->
      </ul>
    </div>
  </div>
</nav>

我登录后的效果图：

教程中的登录后效果是这样的：