Update CHANGELOG.md

Signed-off-by: Edward Ly <[email protected]>

Author: edward-ly

CHANGELOG.md

@@ -1,13 +1,17 @@
-# Change Log
+# Changelog
+
 All notable changes to this project will be documented in this file.
 
 The format is based on [Keep a Changelog](http://keepachangelog.com/)
 and this project adheres to [Semantic Versioning](http://semver.org/).
 
 ## [Unreleased]
 
-## 1.0.0 - 2024-07-12
+## [1.0.0] - 2024-07-22
 
 ### Added
 
-* the app
+- Upload selected Nextcloud files to configured Zulip instance.
+
+[Unreleased]: https://github.com/nextcloud/integration_zulip/compare/v1.0.0...HEAD
+[1.0.0]: https://github.com/nextcloud/integration_zulip/releases/tag/v1.0.0