Update nix requirement from 0.22 to 0.25

Updates the requirements on [nix](https://github.com/nix-rust/nix) to permit the latest version.
- [Release notes](https://github.com/nix-rust/nix/releases)
- [Changelog](https://github.com/nix-rust/nix/blob/master/CHANGELOG.md)
- [Commits](nix-rust/nix@v0.22.0...v0.25.0)

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

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

Author: dependabot[bot]

daemon/Cargo.toml

@@ -33,7 +33,7 @@ libc = "0.2.94"
 serde = { version = "1.0", features = ["derive"] }
 serde_yaml = "0.8"
 toml = "0.5.7"
-nix = "0.22"
+nix = "0.25"
 uuid = { version = "0.8", features = ["v4"] }
 ip_network_table-deps-treebitmap = "0.5.0"