chore(deps): bump nix from 0.29.0 to 0.30.1

Bumps [nix](https://github.com/nix-rust/nix) from 0.29.0 to 0.30.1.
- [Changelog](https://github.com/nix-rust/nix/blob/master/CHANGELOG.md)
- [Commits](nix-rust/nix@v0.29.0...v0.30.1)

---
updated-dependencies:
- dependency-name: nix
  dependency-version: 0.30.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

Cargo.lock

@@ -11,5 +11,5 @@ homepage.workspace = true
 anyhow = "1.0"
 conformance-tests = { git = "https://github.com/fermyon/conformance-tests", rev = "6ec9e9d95e3b333de85685131337c8864c1af67d" }
 log = "0.4"
-nix = { version = "0.29", features = ["signal", "process"] }
+nix = { version = "0.30", features = ["signal", "process"] }
 test-environment = { git = "https://github.com/fermyon/conformance-tests", rev = "6ec9e9d95e3b333de85685131337c8864c1af67d" }