docs: Fix duplicate postgresql package and punctuation error (#38478)
Found duplicate `postgresql` package in installation command. Uncertain
whether it should be `postgresql-contrib` or `postgresql-client`, but
neither appears necessary.
Release Notes:
- N/A
b6944d0bae逃生舱 committed on 9/19/2025, 2:43:25 PM· committed by GitHubparent94fcbb4