Correct: Typo in Documentation for Version 10&12 Section 40.3

The following documentation comment has been logged on the website:

Page: https://www.postgresql.org/docs/12/rules-materializedviews.html
Description:

Hi, 

This a follow-up email with the last one I sent. I wrongly put the link to
version 10, but the typo still exists in version 12 as here
https://www.postgresql.org/docs/12/rules-materializedviews.html.

Yushan