doc: 更新示例

Author: ArgoZhang

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

@@ -8,7 +8,7 @@
 <p>@((MarkupString)Localizer["MediaDeviceDescription"].Value)</p>
 
 <Pre>[Inject, NotNull]
-    private IBluetooth? BluetoothService { get; set; }</Pre>
+private IBluetooth? BluetoothService { get; set; }</Pre>
 
 <Tips>
     <ul class="ul-demo">