Fix code block formatting in templates.md

Corrected code block syntax for Gantt Chart templates.

Author: NithyaSivaprakasam

blazor/gantt-chart/templates.md

@@ -22,7 +22,7 @@ Most templates used in the Gantt Chart are of type `RenderFragment<T>` and are p
 
 For example, the data in a column template can be accessed using `context` as shown below:
 
-```razor
+```cs
 <GanttColumn Field="TaskName" HeaderText="Task">
     <Template Context="context">
         @context.TaskName
@@ -34,4 +34,4 @@ For example, the data in a column template can be accessed using `context` as sh
 
 In Blazor, when a component includes a `RenderFragment` property, it restricts the use of other child components outside that fragment. This is a framework-defined behavior [by design in Blazor](https://github.com/dotnet/aspnetcore/issues/10836), which prevents placing additional child components directly within the parent component.
 
-Due to this limitation, templates such as `TaskbarTemplate` and `MilestoneTemplate` cannot be declared directly under the Gantt Chart component. Instead, they must be wrapped inside a `GanttTemplates` component to ensure proper structure and rendering.
+Due to this limitation, templates such as `TaskbarTemplate` and `MilestoneTemplate` cannot be declared directly under the Gantt Chart component. Instead, they must be wrapped inside a `GanttTemplates` component to ensure proper structure and rendering.