doc: 更新示例

Author: ArgoZhang

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

@@ -29,7 +29,7 @@
 <DemoBlock Title="@Localizer["ProgressDisplayValueTitle"]"
            Introduction="@Localizer["ProgressDisplayValueIntro"]"
            Name="DisplayValue">
-    <BootstrapBlazor.Components.Progress Value="25" IsShowValue="true"></BootstrapBlazor.Components.Progress>
+    <BootstrapBlazor.Components.Progress Value="25.5" IsShowValue="true"></BootstrapBlazor.Components.Progress>
 </DemoBlock>
 
 <DemoBlock Title="@Localizer["ProgressHeightTitle"]"