Conduit API: Add constraint descriptions to phriction.content.search
Summary: I was initially confused about `phids` versus `documentPHIDs`; maybe the missing description would have helped.
Test Plan: Go to http://phorge.localhost/conduit/method/phriction.content.search/, look at the table below "This API endpoint supports these constraints:", see two descriptions which were missing before.
Reviewers: O1 Blessed Committers, mainframe98
Reviewed By: O1 Blessed Committers, mainframe98
Subscribers: tobiaswiese, valerio.bozzolan, Matthew, Cigaryno
Differential Revision: https://we.phorge.it/D26327