Updated mediawiki/extensions
Project: mediawiki/extensions/GettingStarted  d4cd506ef51f5f3a2b987b6eb97b6f35d29b92bf

Refactor Task Recs experiment bucketing logic

* Add the TaskRecommendationsExperimentV1 class, which models a user
  being entered into the Task Recommendations experiment
* Use the class in Hooks::onBeforePageDisplay and Hooks::onPersonalUrls

Change-Id: Ia30ef2481147b78ef2126c328774145495051afc