You are pretty close to harvest, so I would not be doing anything, as trying to remedy the mould could cause more problems than it solves.
I would however be asking myself what has caused the mould to grow there in the first place.
I must also say, that in 35+ years of growing, I have never seen this before.
Make sure to not touch it or spread it further with your choppers when harvesting.
Wishing you a healthy harvest, Organoman.