doc: 更正单词拼写错误

Author: ArgoZhang

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

@@ -78,7 +78,7 @@
     <Popover Title="@Title" Content="@Content" IsHtml="true" Trigger="manual" @ref="_popover">
         <i class="fa-solid fa-flag" style="cursor: pointer;"></i>
     </Popover>
-    <Button Text="Tigger" OnClickWithoutRender="ToggleShow"></Button>
+    <Button Text="Trigger" OnClickWithoutRender="ToggleShow"></Button>
 </DemoBlock>
 
 <AttributeTable Items="@GetAttributes()" />