Update async-channel requirement from 1.4 to 2.1

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@v1.8.0...v2.1.0)

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

Signed-off-by: dependabot[bot] <support@github.com>

crates/bevy_ecs/Cargo.toml

@@ -21,7 +21,7 @@ bevy_tasks = { path = "../bevy_tasks", version = "0.12.0" }
 bevy_utils = { path = "../bevy_utils", version = "0.12.0" }
 bevy_ecs_macros = { path = "macros", version = "0.12.0" }
 
-async-channel = "1.4"
+async-channel = "2.1"
 event-listener = "2.5"
 thread_local = "1.1.4"
 fixedbitset = "0.4.2"

crates/bevy_render/Cargo.toml

@@ -82,7 +82,7 @@ basis-universal = { version = "0.3.0", optional = true }
 encase = { version = "0.6.1", features = ["glam"] }
 # For wgpu profiling using tracing. Use `RUST_LOG=info` to also capture the wgpu spans.
 profiling = { version = "1", features = ["profile-with-tracing"], optional = true }
-async-channel = "1.8"
+async-channel = "2.1"
 
 [target.'cfg(target_arch = "wasm32")'.dependencies]
 js-sys = "0.3"

crates/bevy_tasks/Cargo.toml

@@ -14,7 +14,7 @@ multi-threaded = []
 [dependencies]
 futures-lite = "1.4.0"
 async-executor = "1.3.0"
-async-channel = "1.4.2"
+async-channel = "2.1.0"
 async-io = { version = "2.0.0", optional = true }
 async-task = "4.2.0"
 concurrent-queue = "2.0.0"