chore(Spreadsheet): polish example

Author: xristianstefanov

knowledge-base/spreadsheet-hide-toolbar-formula-sheet-bar.md

@@ -76,8 +76,11 @@ To change the visibility of the toolbar, formula bar, and sheet bar in the Sprea
 
         await base.OnInitializedAsync();
     }
+
+    private const string SampleExcelFile = 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+}
 ````
 
 ## See Also
 
-- [Spreadsheet Overview](https://docs.telerik.com/blazor-ui/components/spreadsheet/overview)
+* [Spreadsheet Overview](slug://spreadsheet-overview)