doc: 更新示例

Author: ArgoZhang

src/BootstrapBlazor.Server/Components/Samples/Selects.razor

@@ -383,11 +383,11 @@
 <DemoBlock Title="@Localizer["SelectsPopoverTitle"]"
            Introduction="@Localizer["SelectsPopoverIntro"]"
            Name="Popover">
-    <div class="row">
-        <div class="col-12 col-sm-6">
-            <Switch @bind-Value="_showPopoverSearch"></Switch>
+    <div class="row g-3 form-inline">
+        <div class="col-12">
+            <Switch @bind-Value="_showPopoverSearch" ShowLabel="true" DisplayText="ShowSearch"></Switch>
         </div>
-        <div class="col-12 col-sm-6 overflow-hidden">
+        <div class="col-12">
             <Select TValue="string" Items="Items" IsPopover="true" ShowSearch="_showPopoverSearch" />
         </div>
     </div>