Fix feature switches doc about UseNativeHttpHandler (#52055)

The value actually checked in the sdk is UseNativeHttpHandler, not HttpNativeHandler.

Author: akoeplinger

docs/workflow/trimming/feature-switches.md

@@ -15,7 +15,7 @@ configurations but their defaults might vary as any SDK can set the defaults dif
 | InvariantGlobalization | System.Globalization.Invariant | All globalization specific code and data is trimmed when set to true |
 | UseSystemResourceKeys | System.Resources.UseSystemResourceKeys |  Any localizable resources for system assemblies is trimmed when set to true |
 | HttpActivityPropagationSupport | System.Net.Http.EnableActivityPropagation | Any dependency related to diagnostics support for System.Net.Http is trimmed when set to false |
-| HttpNativeHandler | System.Net.Http.UseNativeHttpHandler | HttpClient uses by default platform native implementation of HttpMessageHandler if set to true. |
+| UseNativeHttpHandler | System.Net.Http.UseNativeHttpHandler | HttpClient uses by default platform native implementation of HttpMessageHandler if set to true. |
 | StartupHookSupport | System.StartupHookProvider.IsSupported | Startup hooks are disabled when set to false. Startup hook related functionality can be trimmed. |
 | TBD | System.Threading.ThreadPool.EnableDispatchAutoreleasePool | When set to true, creates an NSAutoreleasePool around each thread pool work item on applicable platforms. |
 | CustomResourceTypesSupport | System.Resources.ResourceManager.AllowCustomResourceTypes | Use of custom resource types is disabled when set to false. ResourceManager code paths that use reflection for custom types can be trimmed. |