misc: update CHANGELOG.md

Signed-off-by: Yuxuan Shui <[email protected]>

Author: yshui

CHANGELOG.md

@@ -1,8 +1,13 @@
-# 12.x (unreleased)
+# 12.4 (2024-Nov-09)
 
 ## Improvements
 
 * Better workaround for a NVIDIA qurik, fix high CPU usage when screen is off (#1265)
+* Avoid using xrender convolution in all cases, should improve shadow performance for most users. (#1349)
+
+# Bug fixes
+
+* Fix leak of saved window images.
 
 ## Build fixes