Update the changelog

Author: koute

CHANGELOG.md

@@ -75,7 +75,7 @@ This project adheres to [Semantic Versioning](https://semver.org/).
   instead of `Option<rlim_t>`.
   (#[1668](https://github.com/nix-rust/nix/pull/1668))
 - `uname` now returns a `Result` instead of blindly assuming the call never fails.
-- Getters on the `UtsName` struct now return a `&[u8]` instead of `&str`.
+- Getters on the `UtsName` struct now return a `&OsStr` instead of `&str`.
 
 ### Fixed