Add space for groups

[patcon]

First off, thanks! I really appreciate that this project exists, and am grateful for your energies in making it happen :)

Is this a group who you would feel right including in your list?
http://www.thefirelightgroup.com/team/

They support this annual event: https://www.indigenousmaps.com/ourstory/

[arecvlohe]

@patcon Sorry just seeing this for some reason.

Yes, groups are invited too! Feel free to send in a PR to update the list.

Thank you!