Fix typo in changelog

Signed-off-by: Jiahao XU <Jiahao_XU@outlook.com>

Author: NobodyXu

src/changelog.rs

@@ -6,7 +6,7 @@ use crate::*;
 /// ## Changed
 ///  - Make [`Session::check`] available only on unix.
 ///  - Make [`Socket::UnixSocket`] available only on unix.
-///  - Make [`SessionBuilder::control_socket`] available only on unix.
+///  - Make [`SessionBuilder::control_directory`] available only on unix.
 pub mod unreleased {}
 
 /// ## Fixed