Updated mediawiki/extensions
Project: mediawiki/extensions/E3Experiments  639d37df18229aedd0485572f3bbf92a2430e837
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Log isNew field for gettingstarted-clicks as well.

Prior to this I was only logging it for gettingstarted-impression.

Change-Id: I4ca90bbccbc2daaf834124deec2783755b19075a