doc: 更新示例

Author: ArgoZhang

src/BootstrapBlazor.Server/Components/Samples/ListGroups.razor.cs

@@ -87,6 +87,14 @@ private AttributeItem[] GetAttributes() =>
             DefaultValue = " — "
         },
         new()
+        {
+            Name = "OnDoubleClickItem",
+            Description = Localizer["AttrOnDoubleClickItem"],
+            Type = "Func<TItem, Task>",
+            ValueList = " — ",
+            DefaultValue = " — "
+        },
+        new()
         {
             Name = "GetItemDisplayText",
             Description = Localizer["GetItemDisplayText"],