update changelog

Author: ZJaume

CHANGELOG.md

@@ -6,6 +6,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## Unreleased
+
+## v0.11.0
 ### Added
  - CLI tests.
  - `get_condifence_all` method to retrieve confidence thresholds for all languages.