Specify a new validator type and correct Beacon Node RPC Endpoints.
helm upgrade --install web3signer-validators ethstaking/web3signer-validators \
--set='network=mainnet' \
--set='type=lighthouse' \
--set='validatorsCount=8' \
--set='beaconChainRpcEndpoints[0]=http://lighthouse.chain:5052' \
--set='web3signerEndpoint=http://web3signer:6174' \
--set='dbKeystoreUrl=postgresql://example:example@cloudsqlproxy.default/web3signer_keys' \
--set='graffiti=ethStaking' \
--set='metrics.enabled=true' \
--set='metrics.serviceMonitor.enabled=true' \
--set='metrics.prometheusRule.enabled=true' \
--create-namespace \
--namespace validators