wiki.postgres ​ Tighten trigger permission checks already resolved

[jian he <jian.universality@xxxxxxxxx>]

Hi. 

The following Todo item seems  already resolved in pg15.

https://wiki.postgresql.org/wiki/Todo#Triggers

 Tighten trigger permission checks

• Security leak with trigger functions?

But it seems to not appear in the pg15 release notes. (I searched for the keywords "trigger" and "function").