fix control examples for remove validator

Author: felipemadero

docs/examples.md

@@ -477,7 +477,7 @@ To remove a node as a permissioned validator from a Subnet:
 curl -X POST -k http://localhost:8081/v1/control/removesubnetvalidator  -d '[{"subnetId": "'$SUBNET_ID'", "nodeNames":["node1"]}]'
 
 # or
-avalanche-network-runner control remove-subnet-validator '[{"subnetId": "'$SUBNET_ID'", "nodeNames":["node1"]}]'
+avalanche-network-runner control remove-subnet-validator '[{"subnet_id": "'$SUBNET_ID'", "node_names":["node1"]}]'
 ```
 
 To delegate stake in a permissionless validator in an Elastic Subnet:

docs/reference.md

@@ -558,7 +558,7 @@ avalanche-network-runner control remove-subnet-validator removeValidatorSpec [op
 cli
 
 ```sh
-avalanche-network-runner control remove-subnet-validator '[{"subnetId": "p433wpuXyJiDhyazPYyZMJeaoPSW76CBZ2x7wrVPLgvokotXz", "nodeNames":["node1"]}]'
+avalanche-network-runner control remove-subnet-validator '[{"subnet_id": "p433wpuXyJiDhyazPYyZMJeaoPSW76CBZ2x7wrVPLgvokotXz", "node_names":["node1"]}]'
 ```
 
 curl