Update API for GoToWebinar Integration

Recorded (simulated live) webinars from #GoToWebinar currently do not integrate with MKTO because the Launchpoint integration between GoToWebinar and Marketo does not utilize version 2 of the GoToWebinar API and v2 is required for recorded (simulated live) webinars.

Recorded webinars are super beneficial for reusing content and/or having the same webinar run at different times so more people can attend. I need Marketo to be able to pull attendee data from GTW so that they can get into our follow-up programs.