Update solidity-by-example.rst
Update solidity-by-example.rst

Might be trivial, but makes more sense to be able to directly return the name of the winner for the election. If the position of the winner on the proposal[] array is returned, then people still don't know the name of the person who won.
ruchevits/solidity,ruchevits/solidity,ruchevits/solidity,ruchevits/solidity