docs: Include latest changes for 1.2 (#136)

Signed-off-by: frossq <francesco.asquini@secomind.com>

Author: frossq

CHANGELOG.md

@@ -4,6 +4,12 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
+## [1.2.1] - Unreleased
+
+### Fixed
+- [astarte_realm_management] Insufficient validation for conflicting options in interface aggregate mappings
+  [#1072](https://github.com/astarte-platform/astarte/issues/1072)
+
 ## [1.2.1-rc.0] - 2025-08-22
 ### Added
 - Allow `to_int` in custom enum types to be called with valid integers