docs(changelog): Prepare release 1.3.1

Author: julienloizelet

CHANGELOG.md

@@ -4,6 +4,10 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/en)
 and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
+## [1.3.1] - 2022-03-10
+
+### Fixed
+- Fix `gregwar/captcha` for PHP 8.1 compatibility (by using version 0.15.0 of `crowdsec/bouncer` lib)
 
 ## [1.3.0] - 2022-02-03