[ARFC] GHO Stewards Signer Update

TokenLogic published an ARFC proposing to change the GHO Risk Council Safe signers from a 3-of-4 set of individual addresses to a 2-of-3 configuration using entity-owned Safes operated by LlamaRisk, TokenLogic, and Aave Labs. The Safe address is unchanged, so no GHO Steward contract changes or on-chain governance payload (AIP) are required, and the update will be executed as a standard Safe owner management transaction by the current signers. The stated benefits include signer continuity, operational efficiency, and alignment with the 2-of-3 configuration adopted by other DAO finance Safes; the proposal will proceed to Snapshot if community consensus is reached.