message: ctb: Fix check-l2 magic check
  The value needs to be read from the proxy, not the implementation.
diff: @@ -154,7 +154,7 @@ const checkGenesisMagic = async (
  address = args.l2OutputOracleAddress
  } else {
  const Deployment__L2OutputOracle = await hre.deployments.get(
  - 'L2OutputOracle'
  + 'L2OutputOracleProxy'
  )
  address = Deployment__L2OutputOracle.address
  }
  