annual budget and split between consistency and performance

[acanidio-econ]

Is this still accurate? Note also that there are rewards also on Gnosis chain

docs/docs/cow-protocol/reference/core/auctions/rewards.md

Line 9 in 6fc4097

The annual rewards budget as of now is 16M COW, and the intended split between solver competition and price estimation rewards is currently at 80% for the solver competition (12.8M COW) and 20% for the price estimation competition (3.2M COW).