doc: Fix typo in section for custom pgstats

Michael Paquier <michael@paquier.xyz>

Commit: a5f4ff6c806d359b3d2c28cf902047c830acc132
Author: Michael Paquier <michael@paquier.xyz>
Date: 2024-08-18T22:53:47Z
Releases: 18.0
doc: Fix typo in section for custom pgstats

Per offline report from Erik Rijkers.

Files

PathChange+/−
doc/src/sgml/xfunc.sgml modified +1 −1

Documentation touched