build(deps): bump async-io from 2.3.4 to 2.4.0

Bumps [async-io](https://github.com/smol-rs/async-io) from 2.3.4 to 2.4.0.
- [Release notes](https://github.com/smol-rs/async-io/releases)
- [Changelog](https://github.com/smol-rs/async-io/blob/master/CHANGELOG.md)
- [Commits](smol-rs/async-io@v2.3.4...v2.4.0)

---
updated-dependencies:
- dependency-name: async-io
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

client/Cargo.toml

@@ -16,7 +16,7 @@ version.workspace = true
 aes = { version = "0.8", features = ["zeroize"], optional = true }
 ashpd.workspace = true
 async-fs = { version = "2.1.0", optional = true }
-async-io = { version = "2.3.4", optional = true }
+async-io = { version = "2.4.0", optional = true }
 async-lock = { version = "3.2.0", optional = true }
 blocking = { version = "1.5.1", optional = true }
 cbc = { version = "0.1", features = ["zeroize"], optional = true }