Update changelog

Author: coolreader18

CHANGELOG.md

@@ -49,6 +49,10 @@ This project adheres to [Semantic Versioning](https://semver.org/).
 - Added `MAP_CONCEAL` mmap flag for openbsd.
   (#[1531](https://github.com/nix-rust/nix/pull/1531))
 
+- Deprecated `nix::sys::socket::sockaddr_storage_to_addr` in favor of the new
+  `SockAddr::from_raw_sockaddr`.
+  (#[1504](https://github.com/nix-rust/nix/pull/1504))
+
 ### Changed
 
 - `FdSet::{contains, highest, fds}` no longer require a mutable reference.