Bump nix from 0.14.1 to 0.15.0 (#5488)

Bumps [nix](https://github.com/nix-rust/nix) from 0.14.1 to 0.15.0.
- [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/commits)

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

install/Cargo.toml

@@ -25,7 +25,7 @@ dirs = "2.0.2"
 indicatif = "0.11.0"
 lazy_static = "1.3.0"
 log = "0.4.8"
-nix = "0.14.1"
+nix = "0.15.0"
 reqwest = "0.9.19"
 semver = "0.9.0"
 serde = "1.0.98"