fix: capturing the correct event names in set_attributes

[FoHoOV]

in attributes.js we we are capturing the wrong key for events.

() => (next[key] = create_event(event_name, element, value, opts))

since the lifespan of key outlasts each iteration of that loop, it will point to the last value it was assigned when the callback function is called. so, if the list had multiple values, we always get the last value in that list.

fixes #11777

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