Update index.md (dotnet#17046)

Author: pranavkm

aspnetcore/web-api/index.md

@@ -376,7 +376,7 @@ The `NotFound` method produces an HTTP 404 status code with a `ProblemDetails` b
 
 ### Disable ProblemDetails response
 
-The automatic creation of a `ProblemDetails` instance is disabled when the <xref:Microsoft.AspNetCore.Mvc.ApiBehaviorOptions.SuppressMapClientErrors%2A> property is set to `true`. Add the following code in `Startup.ConfigureServices`:
+The automatic creation of a `ProblemDetails` for error status codes is disabled when the <xref:Microsoft.AspNetCore.Mvc.ApiBehaviorOptions.SuppressMapClientErrors%2A> property is set to `true`. Add the following code in `Startup.ConfigureServices`:
 
 ::: moniker-end