Change reference to doc role
Change reference to doc role

Minor change, but since the doc role is (correctly) referenced as a role in one place, but as a directive in the other, I changed it to be role for uniformity.
xuhdev/nikola,okin/nikola,gwax/nikola,gwax/nikola,getnikola/nikola,xuhdev/nikola,getnikola/nikola,okin/nikola,xuhdev/nikola,okin/nikola,okin/nikola,gwax/nikola,getnikola/nikola,xuhdev/nikola,getnikola/nikola