956287: Updated the insertImageSettings: Add the new image types to the allowedTypes array.

Author: Bhuvaneshwari-SF4208

ej2-asp-core-mvc/rich-text-editor/EJ2_ASP.NETCORE/insert-image-media/insert-images.md

@@ -252,7 +252,7 @@ You can allow the specific images alone to be uploaded using the the allowedType
 
 ``` cshtml
 
-    allowedTypes="@(new string[] {".jpg"})"
+    allowedTypes="@(new string[] {".jpg", ".png", ".jpeg" })"
 
 ```