Add CLI release to the changelog

Author: svix-lucho

ChangeLog.md

@@ -1,6 +1,7 @@
 # Changelog
 
 ## Version 1.45.0
+* CLI **(New)**: New Rust-based CLI with support for all recent Svix functionality.
 * Libs/Rust **(Breaking)**: Add `api::MessageAttemptListAttemptedMessagesOptions` and use it for
   `MessageAttempt::list_attempted_messages`, replacing `MessageAttemptListOptions` which contained
   some extra parameters never used with this method / endpoint ([#1568])