doc: Update URL for PL/PHP

Peter Eisentraut <peter_e@gmx.net>

Commit: c816cc9ea369e7518d276a36875a42608b9e66f6
Author: Peter Eisentraut <peter_e@gmx.net>
Date: 2016-07-11T16:13:45Z
Releases: 9.1.23
doc: Update URL for PL/PHP

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doc/src/sgml/external-projects.sgml modified +1 −1