chore(common): fix broken blocks of code

Author: xristianstefanov

knowledge-base/chart-newtonsoft-seialization-settings.md

@@ -36,8 +36,7 @@ If I use the TelerikChart with a class with `JsonProperties` the values are not
 
 Sample setting:
 
-<div class="skip-repl"></div>
-````C#
+````C#.skip-repl
 [System.CodeDom.Compiler.GeneratedCode("NJsonSchema", "10.1.11.0 (Newtonsoft.Json v12.0.0.0)")]
 public partial class ChartDataModel
 {
@@ -54,8 +53,7 @@ public partial class ChartDataModel
 
 Sample chart that does not display any longer after adding serialization settings:
 
-<div class="skip-repl"></div>
-````RAZOR
+````RAZOR.skip-repl
 <TelerikChart Width="500px">
 
     <ChartSeriesItems>