docs: Add clippy-tracing to related crates (#2628)

## Motivation

Sharing tooling.

## Solution

Adds `clippy-tracing` to related crates.

Closes #2627

README.md

@@ -402,6 +402,7 @@ are not maintained by the `tokio` project. These include:
 - [`tracing-chrome`] provides a layer that exports trace data that can be viewed in `chrome://tracing`.
 - [`reqwest-tracing`] provides a middleware to trace [`reqwest`] HTTP requests.
 - [`tracing-cloudwatch`] provides a layer that sends events to AWS CloudWatch Logs.
+- [`clippy-tracing`] provides a tool to add, remove and check for `tracing::instrument`.
 
 (if you're the maintainer of a `tracing` ecosystem crate not in this list,
 please let us know!)
@@ -445,6 +446,7 @@ please let us know!)
 [`reqwest-tracing`]: https://crates.io/crates/reqwest-tracing
 [`reqwest`]: https://crates.io/crates/reqwest
 [`tracing-cloudwatch`]: https://crates.io/crates/tracing-cloudwatch
+[`clippy-tracing`]: https://crates.io/crates/clippy-tracing
 
 **Note:** that some of the ecosystem crates are currently unreleased and
 undergoing active development. They may be less stable than `tracing` and

tracing/src/lib.rs

@@ -748,6 +748,7 @@
 //!  - [`tracing-logfmt`] provides a layer that formats events and spans into the logfmt format.
 //!  - [`reqwest-tracing`] provides a middleware to trace [`reqwest`] HTTP requests.
 //!  - [`tracing-cloudwatch`] provides a layer that sends events to AWS CloudWatch Logs.
+//!  - [`clippy-tracing`] provides a tool to add, remove and check for `tracing::instrument`.
 //!
 //! If you're the maintainer of a `tracing` ecosystem crate not listed above,
 //! please let us know! We'd love to add your project to the list!
@@ -789,6 +790,7 @@
 //! [`reqwest-tracing`]: https://crates.io/crates/reqwest-tracing
 //! [`reqwest`]: https://crates.io/crates/reqwest
 //! [`tracing-cloudwatch`]: https://crates.io/crates/tracing-cloudwatch
+//! [`clippy-tracing`]: https://crates.io/crates/clippy-tracing
 //!
 //! <pre class="ignore" style="white-space:normal;font:inherit;">
 //!     <strong>Note</strong>: Some of these ecosystem crates are currently