Bump nix from 0.24.2 to 0.25.0 (#1549)

Bumps [nix](https://github.com/nix-rust/nix) from 0.24.2 to 0.25.0.
- [Release notes](https://github.com/nix-rust/nix/releases)
- [Changelog](https://github.com/nix-rust/nix/blob/master/CHANGELOG.md)
- [Commits](https://github.com/nix-rust/nix/compare/v0.24.2...v0.25.0)

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

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

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

polkadot-parachain/Cargo.toml

@@ -92,7 +92,7 @@ substrate-build-script-utils = { git = "https://github.com/paritytech/substrate"
 
 [dev-dependencies]
 assert_cmd = "2.0"
-nix = "0.24"
+nix = "0.25"
 tempfile = "3.3.0"
 tokio = { version = "1.19.2", features = ["macros", "time", "parking_lot"] }
 wait-timeout = "0.2"