Update changelog

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

Author: mulkieran

CHANGES.txt

@@ -1,13 +1,14 @@
 devicemapper 0.33.2 (UNRELEASED)
 ================================
-Recommended Rust toolchain version: 1.67.1
+Recommended Rust toolchain version: 1.68.0
 Lowest supported Rust toolchain version: 1.66.1
 Recommended development release: Fedora 37
 
 - Expose target table related structs:
   https://github.com/stratis-storage/devicemapper-rs/pull/839
 
 - Tidies and Maintenance:
+  https://github.com/stratis-storage/devicemapper-rs/pull/842
   https://github.com/stratis-storage/devicemapper-rs/pull/841
   https://github.com/stratis-storage/devicemapper-rs/pull/838