doc: 更正文档

Author: ArgoZhang

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

@@ -247,7 +247,7 @@
     </BootstrapLabelSetting>
 &lt;/ValidateForm&gt;</Pre>
         <p>
-            @((MarkupString)Localizer["LabelsWidthCode1"].Value) <b>180</b>
+            @((MarkupString)Localizer["LabelsWidthCode1"].Value)
         </p>
         <ul class="ul-demo">
             <li><code>ValidateForm</code> <b>100</b></li>