CHANGELOG: move #1100 (this) to unreleased after rebase

Author: kevinwern

CHANGELOG.md

@@ -12,6 +12,9 @@ This project adheres to [Semantic Versioning](http://semver.org/).
 - Added `NixPath::is_empty`.
   ([#1107](https://github.com/nix-rust/nix/pull/1107))
 
+- Add `clock_gettime`, `clock_settime`, `clock_getres`
+  ([#1100](https://github.com/nix-rust/nix/pull/1100))
+
 ### Changed
 - `Signal::from_c_int` has been replaced by `Signal::try_from`
   ([#1113](https://github.com/nix-rust/nix/pull/1113))
@@ -66,8 +69,6 @@ This project adheres to [Semantic Versioning](http://semver.org/).
   ([#1058](https://github.com/nix-rust/nix/pull/1058))
 - Add `renameat`.
   ([#1097](https://github.com/nix-rust/nix/pull/1097))
-- Add `clock_gettime`, `clock_settime`, `clock_getres`
-  ([#1100](https://github.com/nix-rust/nix/pull/1100))
 
 ### Changed
 - Support for `ifaddrs` now present when building for Android.