build(deps): bump nix from 0.30.1 to 0.31.1

Bumps [nix](https://github.com/nix-rust/nix) from 0.30.1 to 0.31.1.
- [Changelog](https://github.com/nix-rust/nix/blob/master/CHANGELOG.md)
- [Commits](nix-rust/nix@v0.30.1...v0.31.1)

---
updated-dependencies:
- dependency-name: nix
  dependency-version: 0.31.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

Cargo.lock

@@ -67,7 +67,7 @@ which         = "8"
 
 [target.'cfg(target_os = "macos")'.dependencies]
 libproc       = "0.14"
-nix           = {version = "0.30.1", features = ["process"]}
+nix           = {version = "0.31.1", features = ["process"]}
 errno         = "0.3"
 pager         = "0.16"
 uzers         = "0.12"