chore: bump nix from 0.29.0 to 0.30.0

Bumps [nix](https://github.com/nix-rust/nix) from 0.29.0 to 0.30.0.
- [Changelog](https://github.com/nix-rust/nix/blob/master/CHANGELOG.md)
- [Commits](nix-rust/nix@v0.29.0...v0.30.0)

---
updated-dependencies:
- dependency-name: nix
  dependency-version: 0.30.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

Cargo.lock

@@ -23,7 +23,7 @@ clap = { version = "4.5", features = [ "cargo" ] }
 gpio = "0.4"
 librgbmatrix-sys = { version = "0.15", optional = true }
 net2 = "0.2"
-nix = { version = "0.29", features = [ "fs", "term", "net", "poll" ] }
+nix = { version = "0.30", features = [ "fs", "term", "net", "poll" ] }
 regex = "1"
 
 [dev-dependencies]