They haven't notified me of anything, I just found out when I was checking my booking. But in any event, if I do nothing, it is likely that I will miss my connection and be stuck in YYZ. I thought the following would apply to this schedule change that resulted in a below MCT itinerary.

"for reasons within the carrier's control made in the event the passenger is prevented from using all or a portion of his/her ticket. For example, delay or cancellation of flight within carrier's control, inability to provide previously confirmed space (denied boarding), substitution of a different type of equipment or to a lower class of service by carrier (downgrade) other than upon passenger's request, missed connections due to schedule irregularity within carrier's control, or omission of a scheduled stop due to a situation within carrier's control"