databases/rubygem-pg_query: Fix unknown type name 'PgQueryProtobuf'

Make sure to use internal pg_query lib.
Patch is already included upstream in version 2.1.0:
https://github.com/pganalyze/pg_query/pull/216/files

This should fix the build outside of poudriere.

PR: 256741
Reported by: VVD <vvd@unislabs.com>