update chlog

Author: Borda

src/pytorch_lightning/CHANGELOG.md

@@ -6,6 +6,8 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/).
 
 ## [1.8.4] - 2022-12-06
 
+- Direct support for compiled models ([#15922](https://github.com/Lightning-AI/lightning/pull/15922))
+
 
 ## [1.8.3] - 2022-11-22