doc(changelog): latest version is 1.16.0

We are only doing major version bumps from Nextcloud 30 on.

Signed-off-by: Max <max@nextcloud.com>

Author: max-nextcloud

CHANGELOG.md

@@ -4,7 +4,7 @@ All notable changes to this project will be documented in this file.
 
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/).
 
-## 2.0.0 - 2024-09-11
+## 1.16.0 - 2024-09-11
 
 ### Added