If you have received your AOR, you can raise a webform, highlighting your mistake proving it by uploading your IELTS TRF.
It shouldn't create panic, because you get the same points for 8 or 8.5 in IELTS. It would had matter if it had dropped or increased your actual CRS.
When officers review your eligibility, they will check your actual IETLS score from their database and will recalculate your points and will realise that you made an honest mistake, as no one lies about getting a lower score.
