Prop 46: [SIPS-039] Real Yield USD Fee Structure Change

This text proposal is to change the fee structure of Real Yield USD from 0.5% platform and 0% performance to 0% platform and 20% performance.

See the corresponding forum post for more details: https://community.sommelier.finance/t/sips-039-upcoming-proposal-to-change-the-real-yield-usd-fee-structure/1104