refactor: 更新滚动条样式

Author: ArgoZhang

src/BootstrapBlazor/Components/ListView/ListView.razor

@@ -35,7 +35,7 @@
                     {
                         <div @key="@key.GroupName" class="accordion-item">
                             <div class="accordion-header">@key.GroupName</div>
-                            <div class="accordion-body">
+                            <div class="accordion-body scroll">
                                 @foreach (var item in key.Items)
                                 {
                                     @RenderItem(item)

src/BootstrapBlazor/Components/ListView/ListView.razor.cs

@@ -15,7 +15,7 @@ public partial class ListView<TItem> : BootstrapComponentBase
         .AddClassFromAttributes(AdditionalAttributes)
         .Build();
 
-    private string? BodyClassString => CssBuilder.Default("listview-body")
+    private string? BodyClassString => CssBuilder.Default("listview-body scroll")
         .AddClass("is-group", GroupName != null)
         .Build();