chore: prepare v8.0.4 release (#717)

Author: radenkovic

CHANGELOG.md

@@ -5,6 +5,11 @@ All notable changes to this project 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).
 
+## [8.0.4] - 2026-03-18
+
+### Added
+- Add `specificTimeAvailability` support to calendars availability POST API ([#716](https://github.com/nylas/nylas-nodejs/pull/716))
+
 ## [8.0.3] - 2026-03-17
 
 ### Added