Remove : in SriptEventCallback

Author: Kade-github

assets/content/cookbook/Advanced/8.ScriptEventCallbacks.md

@@ -259,7 +259,7 @@ public override function onCountdownStart(event:CountdownScriptEvent):Void
 
 ## Overriding Script Event Callbacks
 
-Even if most base classes have the script event callbacks as empty functions, others have behavior that is entirely dependant on them. As such, you can skip the behavior or call it under a condition depending on if and where you put your super function call. One such example is in the script file for Boyfriend (Christmas):[^bf-christmas]
+Even if most base classes have the script event callbacks as empty functions, others have behavior that is entirely dependant on them. As such, you can skip the behavior or call it under a condition depending on if and where you put your super function call. One such example is in the script file for Boyfriend (Christmas)[^bf-christmas]
 ```haxe
 // ...