deps: Update async-channel requirement from 1 to 2

Updates the requirements on [async-channel](https://github.com/smol-rs/async-channel) to permit the latest version.
- [Release notes](https://github.com/smol-rs/async-channel/releases)
- [Changelog](https://github.com/smol-rs/async-channel/blob/master/CHANGELOG.md)
- [Commits](smol-rs/async-channel@v1.0.0...v2.0.0)

---
updated-dependencies:
- dependency-name: async-channel
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

Cargo.toml

@@ -39,7 +39,7 @@ waker-fn = "1.1.0"
 windows-sys = { version = "0.48.0", features = ["Win32_Foundation"] }
 
 [dev-dependencies]
-async-channel = "1"
+async-channel = "2"
 async-net = "1"
 blocking = "1"
 criterion = { version = "0.4", default-features = false, features = ["cargo_bench_support"] }