Update changelog

Signed-off-by: mulhern <[email protected]>

Author: mulkieran

CHANGES.txt

@@ -7,6 +7,7 @@ Recommended development release: Fedora 41
   https://github.com/stratis-storage/devicemapper-rs/pull/953
 
 - devicemapper-rs-sys: Use pkg-config to find header paths in build.rs:
+  https://github.com/stratis-storage/devicemapper-rs/pull/965
   https://github.com/stratis-storage/devicemapper-rs/pull/952
 
 - Increase rand dependency lower bound to 0.9.0: