doc(MaskOption): update ZIndex documentation (#6675)

Author: ArgoZhang

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

@@ -6,6 +6,9 @@
 <h4>@Localizer["MaskDescription"]</h4>
 
 <DemoBlock Title="@Localizer["MaskNormalTitle"]" Introduction="@Localizer["MaskNormalIntro"]" Name="Normal">
+    <section ignore>
+        <div>@((MarkupString)Localizer["MaskNormalDesc"].Value)</div>
+    </section>
     <button class="btn btn-primary" @onclick="@ShowMask">@Localizer["ShowMaskButtonText"]</button>
 </DemoBlock>
 

src/BootstrapBlazor.Server/Locales/en-US.json

@@ -456,6 +456,7 @@
     "MaskDescription": "By calling the service display and hide methods, a mask layer is displayed to mask the data.",
     "MaskNormalTitle": "Basic usage",
     "MaskNormalIntro": "Call the <code>MaskService</code> mask service example method <code>Show</code> to display a mask, and call the instance method <code>Close</code> to close the mask after 3 seconds",
+    "MaskNormalDesc": "You can adjust the <code>ZIndex</code> <code>Opacity</code> <code>BackgroundColor</code> parameters via <code>MaskOption</code>",
     "ShowMaskButtonText": "Show",
     "MaskContainerTitle": "Container",
     "MaskContainerIntro": "Specify the mask position by setting the <code>MaskOption</code> parameter <code>ContainerId</code>",

src/BootstrapBlazor.Server/Locales/zh-CN.json

@@ -456,6 +456,7 @@
     "MaskDescription": "通过调用服务显示，隐藏方法，显示一个遮罩层对数据进行遮罩操作",
     "MaskNormalTitle": "基本用法",
     "MaskNormalIntro": "调用 <code>MaskService</code> 遮罩服务示例方法 <code>Show</code> 方法显示一个遮罩，3 秒后调用实例方法 <code>Close</code> 关闭遮罩",
+    "MaskNormalDesc": "可以通过 <code>MaskOption</code> 调整 <code>ZIndex</code> <code>Opacity</code> <code>BackgroundColor</code> 参数",
     "ShowMaskButtonText": "打开",
     "MaskContainerTitle": "指定容器",
     "MaskContainerIntro": "通过设置 <code>MaskOption</code> 参数 <code>ContainerId</code> 指定遮罩出现位置",