Add instruction to make a node a validator in running-node-ansible docs
Add instruction to make a node a validator in running-node-ansible docs

zigbee-alliance/distributed-compliance-ledger,zigbee-alliance/distributed-compliance-ledger,zigbee-alliance/distributed-compliance-ledger,zigbee-alliance/distributed-compliance-ledger,zigbee-alliance/distributed-compliance-ledger,zigbee-alliance/distributed-compliance-ledger