update notification for release 0.42

Any feedback? Thanks!
@peterflynn @pthiess @JeffryBooher @ryanstewart @redmunds @dangoor @RaymondLim @larz0 
Suggested cleanup: `New preferences to disable all code hints or hints from an individual provider.` (I personally don't think we should usually capitalize Code Hints in a sentence context, since it feels less like a unique feature name to me. If we were mentioning it alongside other capitalized features, it would make sense to capitalize, but here it seems like we should just treat it as a common noun.)