Two Container Hash libraries on the website

From: Andrey Semashev (andrey.semashev_at_[hidden])
Date: 2023-02-01 12:11:47

Hi,

For some reason, Container Hash is listed twice on this page:

https://www.boost.org/doc/libs/1_81_0/

The two entries seem equivalent except the "C++ Standard Minimum Level"
entry.