Outdated (?) documentation about metrics

[michaldo]

Documentation states:

To enable the integration, apply the following configuration to LettuceClientConfiguration

...
return ClientResources.builder()
              .tracing(new MicrometerTracingAdapter(observationRegistry, "my-redis-cache"))
              .build();

But

1. MicrometerTracingAdapter is deprecated since 3.4
2. There is autoconfiguration LettuceMetricsAutoConfiguration

I feel the documentation is outdated or at least not enough exhaustive