Update changelog

Author: rchi-vail

CHANGELOG.md

@@ -6,6 +6,16 @@ This project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.htm
 
 ## [Unreleased]
 None
+<a name="4.0.4"></a>
+## [4.0.4] - 2022-10-07
+### Added
+- Add `play_ beep` enum to update conference request
+### Changed
+- Call `status` enum `INPROGRESS` to `IN_PROGRESS`
+- Call `status` enum `NOANSWER` to `NO_ANSWER`
+- Conference `play_beep` enum `ENTRYONLY` to `ENTRY_ONLY`
+- Conference `play_beep` enum `EXITONLY` to `EXIT_ONLY`
+
 
 <a name="4.0.3"></a>
 ## [4.0.3] - 2022-08-19