991627: Updated the UG content and samples for Filtering in Blazor DataGrid

Author: SadhanaBaskaran

blazor/datagrid/filter-menu.md

@@ -1463,6 +1463,6 @@ When using the filter menu in the Syncfusion<sup style="font-size:70%">&reg;</su
 
 ```
 
-**Handle null or empty values:** Ensure that null or empty values in the data source are handled appropriately. Preprocess the data if necessary to maintain consistency.
+**Handle null or empty values:** Ensure that null or empty values in the data source are handled appropriately, either within the data itself or by applying preprocessing steps to maintain consistency.
 
 **Verify data type alignment:** Confirm that the data types defined in the column configuration match the actual data types in the data source. Mismatches can lead to unexpected filter behavior.

blazor/datagrid/filtering.md

@@ -89,7 +89,7 @@ public class OrderData
 
 {% previewsample "https://blazorplayground.syncfusion.com/embed/VNrfZCsImdiJgcDd?appbar=false&editor=false&result=true&errorlist=false&theme=bootstrap5" %}
 
-> * Apply and clear filtering using [FilterByColumnAsync](https://help.syncfusion.com/cr/blazor/Syncfusion.Blazor.Grids.SfGrid-1.html#Syncfusion_Blazor_Grids_SfGrid_1_FilterByColumnAsync_System_String_System_String_System_Object_System_String_System_Nullable_System_Boolean__System_Nullable_System_Boolean__System_Object_System_Object_System_String_) and [ClearFilteringAsync](https://help.syncfusion.com/cr/blazor/Syncfusion.Blazor.Grids.SfGrid-1.html#Syncfusion_Blazor_Grids_SfGrid_1_ClearFilteringAsync)methods.
+> * Apply and clear filtering using [FilterByColumnAsync](https://help.syncfusion.com/cr/blazor/Syncfusion.Blazor.Grids.SfGrid-1.html#Syncfusion_Blazor_Grids_SfGrid_1_FilterByColumnAsync_System_String_System_String_System_Object_System_String_System_Nullable_System_Boolean__System_Nullable_System_Boolean__System_Object_System_Object_System_String_) and [ClearFilteringAsync](https://help.syncfusion.com/cr/blazor/Syncfusion.Blazor.Grids.SfGrid-1.html#Syncfusion_Blazor_Grids_SfGrid_1_ClearFilteringAsync) methods.
 > * To disable filtering for a specific column, set the [AllowFiltering](https://help.syncfusion.com/cr/blazor/Syncfusion.Blazor.Grids.GridColumn.html#Syncfusion_Blazor_Grids_GridColumn_AllowFiltering) property of [GridColumn](https://help.syncfusion.com/cr/blazor/Syncfusion.Blazor.Grids.GridColumn.html) as **false**.
 
 ## Initial filter