Mention HTML attribute events in the summary

Author: aruku

2-ui/2-events/02-bubbling-and-capturing/article.md

@@ -206,7 +206,7 @@ When an event happens -- the most nested element where it happens gets labeled a
 
 - Then the event moves down from the document root to `event.target`, calling handlers assigned with `addEventListener(..., true)` on the way (`true` is a shorthand for `{capture: true}`).
 - Then handlers are called on the target element itself.
-- Then the event bubbles up from `event.target` to the root, calling handlers assigned using `on<event>` and `addEventListener` without the 3rd argument or with the 3rd argument `false/{capture:false}`.
+- Then the event bubbles up from `event.target` to the root, calling handlers assigned using `on<event>`, HTML attributes and `addEventListener` without the 3rd argument or with the 3rd argument `false/{capture:false}`.
 
 Each handler can access `event` object properties: