list-groupにscrollbar追加

list.html

<div class="container-fluid" style="height: 100vh;">
    <div class="row" style="height: 10%; background-color: yellow;">
        10
    </div>
    <div class="row" style="height: 80%; background-color: greenyellow;">
        <ul class="list-group" style="max-height: 100%; overflow-y:scroll; ">
            <li class="list-group-item">item1</li>
            <li class="list-group-item">item2</li>
            <li class="list-group-item">item3</li>
            <li class="list-group-item">item4</li>
            <li class="list-group-item">item5</li>
        </ul>
    </div>
    <div class="row" style="height: 10%; background-color: aqua;">
        10
    </div>
</div>