build(deps): update nix requirement from 0.28.0 to 0.29.0

Updates the requirements on [nix](https://github.com/nix-rust/nix) to permit the latest version.
- [Changelog](https://github.com/nix-rust/nix/blob/master/CHANGELOG.md)
- [Commits](nix-rust/nix@v0.28.0...v0.28.0)

---
updated-dependencies:
- dependency-name: nix
  dependency-type: direct:production
...

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

Author: dependabot[bot]

Cargo.toml

@@ -43,7 +43,7 @@ crossbeam-queue = "0.3.8"
 futures-channel = "0.3.29"
 futures-util = "0.3.29"
 libc = "0.2.149"
-nix = "0.28.0"
+nix = "0.29.0"
 once_cell = "1.18.0"
 os_pipe = "1.1.4"
 paste = "1.0.14"