Documentation for NetworkManager 1.30.0 -- Where?

[Richard Owlett <rowlett@access.net>]

I am running Debian 12.8 with MATE 1.26.0 .
When right-clicking on the Network Manager icon's "About" button it 
identifies itself as version 1.30.0 .
There is a link to http://www.gnome.org/projects/NetworkManager/ which 
results in a 404 error.

I have questions about enabling/disabling WiFi.
To ask in intelligently I must be familiar with the documentation.
Where do I find it?

TIA