doc: Update version() and current_date output in tutorial

Peter Eisentraut <peter_e@gmx.net>

Commit: 9ee56dfeee0389d61020db3c6a47bd2690bd040e
Author: Peter Eisentraut <peter_e@gmx.net>
Date: 2016-05-31T20:45:02Z
Releases: 9.6.0
doc: Update version() and current_date output in tutorial

While the version number is automatically updated in the example output,
the other details looked a bit dated.

suggested by mike2.schneider@gmail.com

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doc/src/sgml/start.sgml modified +4 −4

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