doc: fix for plurality typo on bgwriter doc sentence

Bruce Momjian <bruce@momjian.us>

Commit: 793739180735a062d9eadec9ad03dbd5db11e5c0
Author: Bruce Momjian <bruce@momjian.us>
Date: 2019-11-06T02:29:02Z
Releases: 11.6
doc:  fix for plurality typo on bgwriter doc sentence

Reported-by: Justin Pryzby

Discussion: https://postgr.es/m/20191106022353.GX4999@telsasoft.com

Backpatch-through: 11, 12

Files

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

Documentation touched