message: readme: update public meeting schedule
diff: @@ -72,7 +72,8 @@ have prior experience. To get started:
  ## Community Meeting
  -The Envoy team meets every other Tuesday at 9am PT. The public Google calendar is here: https://goo.gl/PkDijT
  +The Envoy team meets twice per month on Tuesday, alternating between 9am PT and 5PM PT. The public
  +Google calendar is here: https://goo.gl/PkDijT
  * Meeting minutes are [here](https://goo.gl/5Cergb)
  * Recorded videos are posted [here](https://www.youtube.com/channel/UCvqbFHwN-nwalWPjPUKpvTA/videos?view=0&sort=dd&shelf_id=1)
  