nerd-fonts-stable: upgrade to 2.3.3

There is a mess with Fira Mono for this release. Please see:

https://github.com/ryanoasis/nerd-fonts/issues/1003

The FiraMono zip still got Fura Mono * ttf files.

Homebrew choosed to still name the package Fira but adapted to contains the Fura files.

https://github.com/Homebrew/homebrew-cask-fonts/pull/6682

Anyway it looks like Fira will last for Mono and Code.