You can upgrade the iPad Pro’s processor now, too

The newly announced iPad Pro hides a sneaky upgrade option that Apple didn’t mention during its event today. When you cough up the $600 it costs to jump from the 256GB base model iPad Pro to the 1TB version, Apple doesn’t just double the RAM along with that — it also puts a faster chip inside, going from a nine-core M4 chip to a 10-core version. This is the first time Apple has offered…