Example comet interface not consistent with CometMainInterface

[Flip-Liquid]

The type returned in the example is incorrect. In CometMainInterface (https://github.com/compound-finance/comet/blob/main/contracts/CometMainInterface.sol), getSupplyRate and getBorrowRate functions are defined as

function getSupplyRate(uint utilization) virtual public view returns (uint64);

function getBorrowRate(uint utilization) virtual public view returns (uint64);

Whereas in the example, the return type is specified as uint[256].