Update CHANGELOG.md

Co-authored-by: Sebastian Bernauer <sebastian.bernauer@stackable.de>

Author: adwk67

CHANGELOG.md

@@ -2,7 +2,7 @@
 
 ## [Unreleased]
 
-### Changed
+### Fixed
 
 - Re-set `API_WORKERS` default to 1 for Airflow 3.x and update/correct docs to reflect this  ([#727]).