Blizzard released the Wrath Classic pre-patch for WoW Classic servers yesterday, August 30. They have a general overview:
https://worldofwarcraft.com/en-us/news/ ... h-now-live
There don't seem to be specific patch notes, but fortunately we have those from our own post archives, nearly 14 years ago!
https://thedruidsgrove.org/archive/wow/t-12903.html