Oracle documentation: update oracle round price

[cmjc]

Describe the update

PR https://github.com/autonity/autonity/pull/967 changes the RoundData.success semantics. So, the docs need updating accordingly.

Edit to make

The merged update requires the doc update for the returned oracle round price status code: https://github.com/autonity/autonity/blob/develop/autonity/solidity/contracts/interfaces/IOracle.sol#L17, Please follow the comments: /**

• @notice RoundData.success Indicates the success of the round data retrieval. If true, the round data for the
• requested symbol and round was successfully aggregated by the protocol. The caller should check the success code
• before using the returned round data. If false, the protocol could not provide data for the requested symbol
• and round, either because the symbol is invalid or because no data was collected for that round. */