docs: document that parking_lot is enabled by full
//! Beware though that this will pull in many extra dependencies that you may not
//! need.
//!
-//! - `full`: Enables all Tokio public API features listed below except `test-util`.
+//! - `full`: Enables all features listed below except `test-util` and `tracing`.
//! - `rt`: Enables `tokio::spawn`, the basic (current thread) scheduler,
//! and non-scheduler utilities.
//! - `rt-multi-thread`: Enables the heavier, multi-threaded, work-stealing scheduler.
