Apple has released the second beta version of OS X 10.11.3 to developers. It can be found now at the Mac Developer Resource Center, or from the Updates section of the Mac App Store on a machine with the previous beta installed.
At the same time, Apple has also seeded the second public beta version of 10.11.3 to members of its Beta Software Program. It can be downloaded on a Mac registered for the program from the Updates section of the Mac App Store.
It's not exactly clear what consumers will see in OS X 10.11.2 when it releases to the public later this year.