message: Add link to July community meetup
  Add link to July community meetup
diff: @@ -155,4 +155,5 @@ how to set up a development environment.
  * [Docker image](https://hub.docker.com/r/preset/superset/)
  * [Youtube Channel](https://www.youtube.com/channel/UCMuwrvBsg_jjI2gLcm04R0g)
  * [May 15, 2020: Virtual Meetup Recording. Topics: 0.36 Overview, Committers Self-Intro, Roadmap](https://www.youtube.com/watch?v=tXGDmqjmcTs&t=20s)
  + * [July 16, 2020: Virtual Meetup Recording. Topics: Visualization Plugins, 0.37 Preview, Demo](https://www.youtube.com/watch?v=f6up5x_iRbI)
  * [So, You Want to Build a Superset Viz Plugin...](https://preset.io/blog/2020-07-02-hello-world/)
  