NiPoPoW proof. Include headers which are needed for next difficulty recalculation. #680
Description
discord - https://discord.com/channels/668903786361651200/669989266478202917/1068594540056940677
The fix in the node proof generation - https://github.com/ergoplatform/ergo/pull/1937/files#diff-e0c888d1f0cf0be7f62432527eb00a6c545904f9335ccc87e145cae6e8e7817a in ergoplatform/ergo#1937 PR
Ref #495