Confirm timetable for Rails Girls

https://railsgirlssummerofcode.org/guide/projects/

Dec 2019 & Jan 2020: Call for Projects
Jan 2020: Crowdfunding campaign begins
Feb 2020: Student applications
May 2020: Successful teams announced
01 July 2020: Kickoff RGSoC!
30 Sep 2020: Last day of RGSoC projects
