This is a great question, thanks for sending it!
Updating the lore consistently is a somewhat tall order, although we are planning a general revisiting of all the bios to make adjustments to generally improve them. I can't give you an ETA but it's something we're all intent on doing. The reason this is tough to do regularly is mostly because any change we make needs to be reflected in bios across all languages and platforms, which involves localization (translation) and regional updates everywhere League of Legends is supported (which involves several other teams). This said, I would certainly like to get us to the point where we can be more reactive to these types of changes.