Fixed onBeforeChangeEngine duplication

Author: root

docs/creating-manifest/events.md

@@ -714,7 +714,7 @@ The event is performed before changing the engine's version (e.g. from *php 7* t
 
 ### onAfterChangeEngine
 
-The event is performed after changing the engine's version (e.g. from *php 7* to *php 7.1*) in the required environment. The *onBeforeChangeEngine* event is not compatible with Docker-based environments.
+The event is performed after changing the engine's version (e.g. from *php 7* to *php 7.1*) in the required environment. The *onAfterChangeEngine* event is not compatible with Docker-based environments.
 
 **Event Placeholders:**