Add missing article

Alvaro Herrera <alvherre@alvh.no-ip.org>

Commit: 80f021ef139affdb219ccef71fff283e8f91f112
Author: Alvaro Herrera <alvherre@alvh.no-ip.org>
Date: 2018-02-12T14:39:25Z
Releases: 11.0
Add missing article

Noticed while reviewing nearby text

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doc/src/sgml/ddl.sgml modified +1 −1

Documentation touched