Include having a physical disability as a minority group

Open Zeger-Jan van de Weg requested to merge zj-include-more-minorities into master

I don't have data at hand, but I have a strong suspicion people with a physical disability are a minority group.

GitLab as a company is really well suited, as you can work where it suits you best which might open a lot of opportunities.

Let me know what you all think.

/cc @sashab @jparrow (don't know who to ping :) )