Fix summary sample doc

[CaptEmulation]

Fixed summary sample names

[convoliution]

@CaptEmulation @daniel-verta Looking over this, I'm noticing that it's the attribute names themselves that are wrong, rather than the docs. They should be changed to match the parameters of summary.log_sample() (time_window_start, time_window_end, and created_after). I'll try to get around to this sometime soon.

[liuverta]

The monitoring sub-client has been removed.