Fix Highest Latency Card

[jonbeckman]

data.highestResponseTimeWebsiteId does not seem to be populated, ever

{data.highestResponseTimeWebsiteId ? (
  <>
    <IconLink className="h-4 w-4" />
    <a
      href={`/endpoint-monitors/${data.highestResponseTimeWebsiteId}`}
      className="hover:underline"
      title={`View endpoint monitor ${data.highestResponseTimeWebsiteId}`}
    >
      {data.highestResponseTimeWebsiteId}
    </a>
  </>
) : (
  <span>Last 24 hours</span>
)}