Update formatting.md (#18369)

Author: JasonCard

aspnetcore/web-api/advanced/formatting.md

@@ -146,7 +146,7 @@ public IActionResult Get()
 
 ### Add Newtonsoft.Json-based JSON format support
 
-Prior to ASP.NET Core 3.0, the default used JSON formatters implemented using the `Newtonsoft.Json` package. In ASP.NET Core 3.0 or later, the default JSON formatters are based on `System.Text.Json`. Support for `Newtonsoft.Json` based formatters and features is available by installing the [Microsoft.AspNetCore.Mvc.NewtonsoftJson](https://www.nuget.org/packages/Microsoft.AspNetCore.Mvc.NewtonsoftJson/) NuGet package and configuring it in `Startup.ConfigureServices`.
+Prior to ASP.NET Core 3.0, the default used JSON formatters implemented using the `Newtonsoft.Json` package. In ASP.NET Core 3.0 or later, the default JSON formatters are based on `System.Text.Json`. Support for `Newtonsoft.Json` based formatters and features is available by installing the [`Microsoft.AspNetCore.Mvc.NewtonsoftJson`](https://www.nuget.org/packages/Microsoft.AspNetCore.Mvc.NewtonsoftJson/) NuGet package and configuring it in `Startup.ConfigureServices`.
 
 [!code-csharp[](./formatting/3.0sample/StartupNewtonsoftJson.cs?name=snippet)]