meta: fix changelog (#3148)

Author: armcknight

CHANGELOG.md

@@ -1,5 +1,11 @@
 # Changelog
 
+## Unreleased
+    
+### Fixes
+
+- Fix potential unbounded memory growth when starting profiled transactions from non-main contexts (#3135)
+
 ## 8.9.0
 
 ### Features
@@ -11,10 +17,6 @@
 
 - Renamed `enableTimeToFullDisplay` to `enableTimeToFullDisplayTracing` (#3106)
     - This is an experimental feature and may change at any time without a major revision.
-    
-### Fixes
-
-- Fix potential unbounded memory growth when starting profiled transactions from non-main contexts (#3135)
 
 ## 8.9.0-beta.1