doc: 更新示例

Author: ArgoZhang

src/BootstrapBlazor.Server/Components/Layout/HomeLayout.razor

@@ -65,7 +65,7 @@
             <FooterCounter></FooterCounter>
             <CacheCounter></CacheCounter>
             <div class="ms-2">
-                <NetworkMonitorIndicator PopoverPlacement="Placement.Bottom"></NetworkMonitorIndicator>
+                <NetworkMonitorIndicator></NetworkMonitorIndicator>
             </div>
         </div>
         <div class="d-flex flex-fill align-items-center justify-content-center">