Spring Complete Kotlin example for HTTP message codecs in reference doc

It already has one written in Java:

@Configuration
@EnableWebFlux
public class WebConfig implements WebFluxConfigurer {

    @Override
    public void configureHttpMessageCodecs(ServerCodecConfigurer configurer) {
        configurer.defaultCodecs().maxInMemorySize(512 * 1024);
    }
}

It's straightforward to translate to Kotlin so...