docs(gantt): fix tooltip example (#1599)

There was an incorrect end tag for the TelerikFontIcon

Author: YanushevGeorgi

components/gantt/timeline/templates/tooltip.md

@@ -45,7 +45,7 @@ Apart from that, you can add and customize any other content - for example, icon
               OnDelete="@DeleteItem">
     <TooltipTemplate>
             <h5>@(((TooltipTemplateContext)context).Title)</h5>        
-            <TelerikFontIcon Class="status" Icon="@FontIcon.Rotate"></TelerikIcon>
+            <TelerikFontIcon Class="status" Icon="@FontIcon.Rotate"></TelerikFontIcon>
             @(((TooltipTemplateContext)context).DataAttributes["percent"])% Completed                
         <br />
     </TooltipTemplate>
@@ -174,4 +174,4 @@ Apart from that, you can add and customize any other content - for example, icon
 
 ## See Also
 
-  * [Live Demo: Gantt Templates](https://demos.telerik.com/blazor-ui/gantt/templates)
+  * [Live Demo: Gantt Templates](https://demos.telerik.com/blazor-ui/gantt/templates)