Skip int conversion in ClientHttpRequestFactories

@poutsma added `JdkClientHttpRequestFactory.setReadTimeout(Duration)`
so the conversion to and from int is no longer needed.

See gh-36270

Author: spencergibb

spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/client/ClientHttpRequestFactories.java

@@ -285,7 +285,7 @@ static JdkClientHttpRequestFactory get(ClientHttpRequestFactorySettings settings
 			java.net.http.HttpClient httpClient = createHttpClient(settings.connectTimeout(), settings.sslBundle());
 			JdkClientHttpRequestFactory requestFactory = new JdkClientHttpRequestFactory(httpClient);
 			PropertyMapper map = PropertyMapper.get().alwaysApplyingWhenNonNull();
-			map.from(settings::readTimeout).asInt(Duration::toMillis).to(requestFactory::setReadTimeout);
+			map.from(settings::readTimeout).to(requestFactory::setReadTimeout);
 			return requestFactory;
 		}