Bump libc from 0.2.167 to 0.2.168

Bumps [libc](https://github.com/rust-lang/libc) from 0.2.167 to 0.2.168.
- [Release notes](https://github.com/rust-lang/libc/releases)
- [Changelog](https://github.com/rust-lang/libc/blob/0.2.168/CHANGELOG.md)
- [Commits](rust-lang/libc@0.2.167...0.2.168)

---
updated-dependencies:
- dependency-name: libc
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Cargo.toml

@@ -16,7 +16,7 @@ cargo_metadata = { version = "0.18.0", default-features = false }
 # See https://github.com/clap-rs/clap/blob/61f5ee5/clap_builder/src/lib.rs#L15.
 clap = { version = "4.5.23", default-features = false, features = ["std"] }
 env_logger = { version = "0.11.5", default-features = false }
-libc = { version = "0.2.159", default-features = false }
+libc = { version = "0.2.168", default-features = false }
 log = { version = "0.4.22", default-features = false }
 tokio = { version = "1.40.0", default-features = false }
 which = { version = "6.0.0", default-features = false }