chore(deps): bump nix from 0.30.1 to 0.31.2 (#58)

Bumps [nix](https://github.com/nix-rust/nix) from 0.30.1 to 0.31.2.
- [Changelog](https://github.com/nix-rust/nix/blob/master/CHANGELOG.md)
- [Commits](nix-rust/nix@v0.30.1...v0.31.2)

---
updated-dependencies:
- dependency-name: nix
  dependency-version: 0.31.2
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

Cargo.lock

@@ -66,7 +66,7 @@ toml = "1.1"
 # dance does. Non-Linux builds compile the module's `Subscriber::new` to
 # a stub that returns `NetlinkError::Unsupported`.
 [target.'cfg(target_os = "linux")'.dependencies]
-nix = { version = "0.30", default-features = false, features = ["socket", "net", "uio"] }
+nix = { version = "0.31", default-features = false, features = ["socket", "net", "uio"] }
 
 [[bin]]
 name = "5spot-reclaim-agent"