Beyond that small change everything should keep working as before (if not please post here!).
Sorry I missed this bit before I created this topic: Problem Triggering Binder Build through API endpoint
Given that my topic seems to be quite specific though perhaps I should keep the topic instead of migrating the discussion here?
Edit: The above issue isn’t really an issue. It was quickly resolved and should have been obvious had I thought more about it (or had a coffee first).