Bump nix from 0.26.4 to 0.29.0

Bumps [nix](https://github.com/nix-rust/nix) from 0.26.4 to 0.29.0.
- [Changelog](https://github.com/nix-rust/nix/blob/master/CHANGELOG.md)
- [Commits](nix-rust/nix@v0.26.4...v0.29.0)

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

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

Author: dependabot[bot]

Cargo.lock

@@ -130,7 +130,7 @@ strum_macros = "0.26"
 backtrace = "0.3"
 linkme = "0.3"
 serde = { version = "1", features = ["derive"] }
-nix = "0.26"
+nix = "0.29"
 cfg-if = "1"
 redis-module-macros-internals = { path = "./redismodule-rs-macros-internals", version = "2.0.7"}
 log = "0.4"