DataGrid: Add hierarchical header filter image (#7985)

Author: arman-boyakhchyan

concepts/05 UI Components/DataGrid/75 Implement a Hierarchical Header Filter/00 Implement a Hierarchical Header Filter.md

@@ -1 +1,3 @@
-DataGrid supports hierarchical data structures in column [headerFilters](/api-reference/_hidden/GridBaseColumn/headerFilter '/Documentation/ApiReference/UI_Components/dxDataGrid/Configuration/columns/headerFilter/'). This tutorial demonstrates how to implement a hierarchical header filter for a specific column.
+DataGrid supports hierarchical data structures in column [headerFilters](/api-reference/_hidden/GridBaseColumn/headerFilter '/Documentation/ApiReference/UI_Components/dxDataGrid/Configuration/columns/headerFilter/'). This tutorial demonstrates how to implement a hierarchical header filter for a specific column.
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+<img src="/images/DataGrid/datagrid-hierarchical-header-filter.png" alt="DevExtreme DataGrid Hierarchical Header Filter" style="width: 80%; margin:0px auto; display:block;" />