fix merged changelog

Author: Al Hoang

CHANGELOG.md

@@ -9,18 +9,12 @@ This project adheres to [Semantic Versioning](https://semver.org/).
 - impl From<SockaddrIn> for std::net::SocketAddrV4 and
   impl From<SockaddrIn6> for std::net::SocketAddrV6.
   (#[1711](https://github.com/nix-rust/nix/pull/1711))
-
-### Changed
-### Fixed
-### Removed
-## [Unreleased] - 
-### Added
-
 - Fixed compilation and updated support on Haiku
 - Added x86_64-unknown-haiku target to builder
 
 ### Changed
 ### Fixed
+### Removed
 
 ## [0.24.1] - 2022-04-22
 ### Added