Update CHANGELOG for PR #2111

[skip ci]

Author: asomers

CHANGELOG.md

@@ -3,6 +3,13 @@
 All notable changes to this project will be documented in this file.
 This project adheres to [Semantic Versioning](https://semver.org/).
 
+## [Unreleased] - ReleaseDate
+
+### Fixed
+
+- Fixed generating the documentation on docs.rs.
+  ([#2111](https://github.com/nix-rust/nix/pull/2111))
+
 ## [0.27.0] - 2023-08-28
 ### Added
 - Added `AT_EACCESS` to `AtFlags` on all platforms but android