Wiki typo suggested fix

There is a typo in: https://wiki.postgresql.org/wiki/Homebrew

In the middle section it says you can get to postgres via $ pgsql postgres
this should be $ psql postgres

--
*Nick Bauer-Levey*
Lead Software Engineer

Gagosian | New York, NY
www.gagosian.com <http://www.flatiron.com/>

--
CONFIDENTIALITY NOTICE
The information contained in this communication
(including, without limitation, in any attachment) is confidential and is
intended for disclosure only to the addressee(s). If you are not an
intended recipient or have otherwise received this communication in error,
please notify the sender and then delete it, and you are hereby notified
that any review, use, dissemination, distribution or copying of any of the
contents of this communication is strictly prohibited.