message: op-node: Update heartbeat DNS
diff: @@ -167,7 +167,7 @@ var (
  Name: "heartbeat.url",
  Usage: "Sets the URL to heartbeat to",
  EnvVar: prefixEnvVar("HEARTBEAT_URL"),
  - Value: "https://heartbeat.bedrock-goerli.optimism.io",
  + Value: "https://heartbeat.optimism.io",
  }
  )
  