Yes, you need to make a new app update. I just emailed Apple yesterday and they replied today, saying I would need to. I have around 11 apps on AppStore, all are games, which I won't need to update, unless if I have a new language to add, which is rarely happened.
Tbh I don't want to touch them and cause any issues.
Anyway, I talked to some other dev friends and all said they won't update them as well.
Topic:
App Store Distribution & Marketing
SubTopic:
General