pgsql: doc: add comma to UPDATE docs, for consistency

doc: add comma to UPDATE docs, for consistency

Reported-by: X-MAN

Author: X-MAN

Discussion: /messages/by-id/tencent_90A64D807DE3586650CF3426C28BB599D30A@qq.com

Branch
------
master

Details
-------
https://git.postgresql.org/pg/commitdiff/9a41b34a28702a71cc0a0e77dd80ca80366d12fb

Modified Files
--------------
doc/src/sgml/ref/update.sgml | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)