Update 2020 meeting dates when new dates are announced

[dorothyyeager]

Summary

What we are after:
New meeting dates for 2020 are forthcoming. We need to create those meeting pages after they are announced.

Completion criteria

• When dates are available for next set of 2020 meetings, meeting pages are created in Updates
  Format for slugs: month-day-year-open-meeting (for open meetings) and month-day-year-executive-session (for executive sessions)

• Promote tabs are filled in. Example:
  

• Let calendar editor in Info Div and Commission Secretary know when posted.

[dorothyyeager]

Moving this to blocked. The dates have been approved; the Commission Secretary will signal us when the Chair is ready to post them.

[dorothyyeager]

And the Chair is ready to post them; moving to assigned.

[kathycarothers]

The new dates have been added to the executive session page.