Update CHANGELOG.md

Author: nvuillam

CHANGELOG.md

@@ -6,6 +6,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 
 ## [Unreleased] (beta, main branch content)
 
+## [2.12.0] 2023-08-29
+
 - Fix exit code that should be 1 according to --failon value [#71](https://github.com/Force-Config-Control/lightning-flow-scanner-sfdx/issues/71)
 
 ## [2.11.0] 2023-08