Fix deprecation decorator breaking the getExtruder function

cura/Settings/MachineManager.py

@@ -986,8 +986,9 @@ class MachineManager(QObject):
         self._application.globalContainerStackChanged.emit()
         self.forceUpdateAllSettings()
 
+    # Note that this function is deprecated, but the decorators for this don't play well together!
+    # @deprecated("use Cura.MachineManager.activeMachine.extruders instead", "4.2")
     @pyqtSlot(int, result = QObject)
-    @deprecated("use Cura.MachineManager.activeMachine.extruders instead", "4.2")
     def getExtruder(self, position: int) -> Optional[ExtruderStack]:
         if self._global_container_stack:
             return self._global_container_stack.extruders.get(str(position))