doc: Fix description about bgwriter and checkpoint in HA section
Since 806a2ae, the work of the bgwriter is split the checkpointer, but a
portion of the documentation did not get the message.
Author: Masahiko Sawada
Discussion: https://postgr.es/m/CA+fd4k6jXxjAtjMVC=wG3=QGpauZBtcgN3Jhw+oV7zXGKVLKzQ@mail.gmail.com
Backpatch-through: 9.5
Branch
------
REL_11_STABLE
Details
-------
https://git.postgresql.org/pg/commitdiff/7aa0cae752330cbd113df5b059ba95b82a87ecae
Modified Files
--------------
doc/src/sgml/high-availability.sgml | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)