Adds another note about computed coulmns to the docs
Adds another note about computed coulmns to the docs

diogob/postgrest,league/postgrest,Skyfold/postgrest,NotBrianZach/postgrest,NikolayS/postgrest,motiz88/postgrest,ruslantalpa/postgrest,begriffs/postgrest,steve-chavez/postgrest,steve-chavez/postgrest