Documentation wrongly states that zipkin-sender-urlconnection is needed

In https://docs.spring.io/spring-boot/reference/actuator/tracing.html, there's this text:

> If your project doesn’t use Spring MVC or Spring WebFlux, the io.zipkin.reporter2:zipkin-sender-urlconnection dependency is needed, too. 

This is not true anymore as of Boot 3.3.0, which shipped with a `HttpClient` based Zipkin sender, which will be used if there's no MVC or Webflux.