Tidy changelog

Signed-off-by: mulhern <amulhern@redhat.com>

Author: mulkieran

CHANGES.txt

@@ -4,7 +4,7 @@ Recommended Rust toolchain version: 1.71.1
 Lowest supported Rust toolchain version: 1.71.1
 Recommended development release: Fedora 38
 
-- Increase bindgen dependency lower bound to 0.68.1:
+- devicemapper-sys: Increase bindgen dependency lower bound to 0.68.1:
   https://github.com/stratis-storage/devicemapper-rs/pull/880
 
 - Increase bitflags dependency lower bound to 2.3.3:
@@ -13,7 +13,7 @@ Recommended development release: Fedora 38
 - Do not use default features for retry crate:
   https://github.com/stratis-storage/devicemapper-rs/pull/869
 
-- Remove unused nix dependency specification in -sys directory:
+- devicemapper-sys: Remove unused nix dependency specification:
   https://github.com/stratis-storage/devicemapper-rs/pull/872
 
 - Tidies and Maintenance: