doc: Update link

Peter Eisentraut <peter_e@gmx.net>

Commit: 95a23165fd9d0a3e8d3d5b8637237d2b7d93783c
Author: Peter Eisentraut <peter_e@gmx.net>
Date: 2017-04-21T23:43:50Z
Releases: 9.6.3
doc: Update link

The reference "That is the topic of the next section." has been
incorrect since the materialized views documentation got inserted
between the section "rules-views" and "rules-update".

Author: Zertrin <postgres_wiki@zertrin.org>

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doc/src/sgml/rules.sgml modified +1 −1

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