doc: fix wording describing the checkpoint_flush_after GUC

Bruce Momjian <bruce@momjian.us>

Commit: 5ba1ac99a8d8623604d3152be8fd9a201ba5240b
Author: Bruce Momjian <bruce@momjian.us>
Date: 2023-11-09T22:51:19Z
Releases: 17.0
doc: fix wording describing the checkpoint_flush_after GUC

Reported-by: Evan Macbeth

Discussion: https://postgr.es/m/155208475619.1380.12815553062985622271@wrigleys.postgresql.org

Backpatch-through: master

Files

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

Documentation touched