Bump async-std from 1.12.0 to 1.13.0

Bumps [async-std](https://github.com/async-rs/async-std) from 1.12.0 to 1.13.0.
- [Release notes](https://github.com/async-rs/async-std/releases)
- [Changelog](https://github.com/async-rs/async-std/blob/main/CHANGELOG.md)
- [Commits](https://github.com/async-rs/async-std/commits)

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

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

substrate-relay/Cargo.toml

@@ -11,7 +11,7 @@ workspace = true
 
 [dependencies]
 anyhow = "1.0"
-async-std = "1.9.0"
+async-std = "1.13.0"
 async-trait = "0.1.81"
 codec = { package = "parity-scale-codec", version = "3.6.1" }
 env_logger = "0.11"