If you're signed up to get SNS Notifications from McAfee (for the MVM Product) then you will get notifications any time a new FSL Content Package is released. It will have a link to the release notes here:
The release notes mention what's changed for any updated scripts. For example:
Risk is updated.
FASLScript is updated.
If you want to sign up to get SNS notifications go here:
I hope that helps!