BBB Analytics indicator with incorrect cognitive depth.

the BBB analytics indicator is configured with a cognitive depth of "4"
https://github.com/moodle/moodle/blob/master/mod/bigbluebuttonbn/classes/analytics/indicator/cognitive_depth.php#L68

If included in a model this throws the error in the Train models scheduled task.

Coding error detected, it must be fixed by a programmer: Activities with a potential cognitive or social level that include viewing feedback should define "feedback_viewed_events" method or should override feedback_viewed method.

I suspect the cognitive depth should actually be "2" - as there aren't any feedback touch points in BBB (at least none currently being tracked?)