Update bot.fsx

I didn't test it when I actually committed. Turns out:

    |> Observable.subscribe (fun s -> client.Uptime (if s.Contains("#foo") then "#foo" elif s.Contains("#bar") then "#bar" else "someuser") |> Async.Start)

had to be one line. Otherwise it wouldn't have invoked. Not sure why, maybe the string was disposed because it's asynchronous?