Bump nix from 0.29.0 to 0.31.2 (#15)

Bumps [nix](https://github.com/nix-rust/nix) from 0.29.0 to 0.31.2.
- [Changelog](https://github.com/nix-rust/nix/blob/master/CHANGELOG.md)
- [Commits](nix-rust/nix@v0.29.0...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

@@ -38,7 +38,7 @@ kvm-bindings = { version = "0.14", features = ["fam-wrappers"] }
 vm-memory = { version = "0.17", features = ["backend-mmap"] }
 linux-loader = { version = "0.13", features = ["bzimage", "elf"] }
 virtio-queue = "0.17"
-nix = { version = "0.29", features = ["fs", "ioctl", "mman", "net", "signal", "socket"] }
+nix = { version = "0.31", features = ["fs", "ioctl", "mman", "net", "signal", "socket"] }
 io-uring = { version = "0.7", optional = true }
 
 [workspace]