Please avoid the updates. There is no (and there will never be a) good notification for "oh, look, here are some updates that you might be interested in". Very minor updates are usually completely fine (in part because nobody needs to be notified about such an update). Major updates should just be avoided, instead adding a new reply so those interested in following along can tell that significant new information has been added to the thread.

Though, now that you have already done significant updates, please don't respond to this advice by trying to make even more significant updates by trying to move some of your prior updates into new replies. Just avoid the significant updates in future, please.