transport(daily): update CHANGELOG.md with dialout/dialin updates

CHANGELOG.md

@@ -5,6 +5,17 @@ All notable changes to **pipecat** will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [Unreleased]
+
+### Added
+
+- Added Daily transport `start_dialout()` to be able to make phone or SIP calls.
+  See https://reference-python.daily.co/api_reference.html#daily.CallClient.start_dialout
+
+- Added Daily transport events: `on_dialin_ready`, `on_dialout_connected`,
+  `on_dialout_stopped`, `on_dialout_error` and `on_dialout_warning`.
+  See https://reference-python.daily.co/api_reference.html#daily.EventHandler
+
 ## [0.0.21] - 2024-05-22
 
 ### Added