[DOCS] Typo in trigger docs

The following documentation comment has been logged on the website:

Page: https://www.postgresql.org/docs/9.6/static/trigger-definition.html
Description:


https://www.postgresql.org/docs/9.6/static/trigger-definition.html


I believe that ("statement" is wrong):

"Row-level BEFORE triggers fire immediately before a particular row is
operated on, while row-level AFTER triggers fire at the end of the statement
(but before any statement-level AFTER triggers)."


should be:

"Row-level BEFORE triggers fire immediately before a particular row is
operated on, while row-level AFTER triggers fire after the row has been
operated on (but before any statement-level AFTER triggers)."


BR,

Igor