chore: update changelog (#1538)

Co-authored-by: owncloud-calens-bot[bot] <276982735+owncloud-calens-bot[bot]@users.noreply.github.com>

Author: owncloud-translations-bot[bot]

CHANGELOG.md

@@ -1,6 +1,6 @@
 # Table of Contents
 
-* [Changelog for unreleased](#changelog-for-owncloud-ios-client-unreleased-unreleased)
+* [Changelog for 12.7.0](#changelog-for-owncloud-ios-client-1270-2026-03-27)
 * [Changelog for 12.6.1](#changelog-for-owncloud-ios-client-1261-2025-12-09)
 * [Changelog for 12.6.0](#changelog-for-owncloud-ios-client-1260-2025-08-08)
 * [Changelog for 12.5.0](#changelog-for-owncloud-ios-client-1250-2025-05-12)
@@ -31,11 +31,11 @@
 * [Changelog for 11.5.1](#changelog-for-owncloud-ios-client-1151-2021-02-17)
 * [Changelog for 11.5.0](#changelog-for-owncloud-ios-client-1150-2021-02-10)
 * [Changelog for 11.4.5 versions and below](#changelog-for-1145-versions-and-below)
-# Changelog for ownCloud iOS Client [unreleased] (UNRELEASED)
-The following sections list the changes in ownCloud iOS Client unreleased relevant to
+# Changelog for ownCloud iOS Client [12.7.0] (2026-03-27)
+The following sections list the changes in ownCloud iOS Client 12.7.0 relevant to
 ownCloud admins and users.
 
-[unreleased]: https://github.com/owncloud/ios-app/compare/milestone/12.6.1...master
+[12.7.0]: https://github.com/owncloud/ios-app/compare/milestone/12.6.1...milestone/12.7.0
 
 ## Summary