[pgpool-committers: 9710] pgpool: Doc: fix English watchdog document.

[Tatsuo Ishii]

Doc: fix English watchdog document.

It mistakenly used "main" PostgreSQL node instead of "primary".

Branch
------
V4_2_STABLE

Details
-------
https://git.postgresql.org/gitweb?p=pgpool2.git;a=commitdiff;h=2fa4088d0a5138b112ee3c05540d6038d4e743ba

Modified Files
--------------
doc/src/sgml/watchdog.sgml | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)