docs(changelog): add after_exit tracing fix note

Author: KitaroMoha563

CHANGELOG.md

@@ -5,6 +5,7 @@
 #### Bug Fixes
 
 - Reverted `InvokeKind::ProcRef` back to `InvokeKind::Exec` in `visit_mut_procref` and added an explanatory comment (#2893).
+- Fixed `FastProcessor` so `after_exit` trace decorators execute when tracing is enabled without debug mode, and added a tracing-only regression test.
 #### Changes
 
 - [BREAKING] Sync execution and proving APIs now require `SyncHost`; async `Host`, `execute`, and `prove` remain available ([#2865](https://github.com/0xMiden/miden-vm/pull/2865)).