message: docs: ng-conf 2020 date change
  Update the range of dates where ng-conf will appear on angular.io.
  PR Close
diff: [
  {
  - "startDate": "2020-03-01",
  + "startDate": "2020-01-01",
  "endDate": "2020-03-31",
  "message": "Join us for ng-conf<br/>April 1st-3rd, 2020",
  "imageUrl": "generated/images/marketing/home/ng-conf.png",
  