Yep, just as my good friend Arthur has confirmed, that's correct.
ILR (and Citizenship) now requires a B1 passing grade for. The IELTS minimum grade is just that B1.
That'll save some time and some cash too
Here's what UKBA say:-
.....The fact that an applicant’s qualifying English language certificate had expired would not prevent them from using their pass notification as evidence that they had reached level B1 (CEFR) English for a settlement or British citizenship application. They would not be expected to take another English
Language test, but will need to pass the Life in the UK test.