Yes, toggling on Watch there at that repository will get you all configuration changes to:
Admin Manual
User Manual
Developer Guide
The only bits missing will be:
Config.php sample changes (those are in the Admin Manual but actually generated from the main server repository)
For the clients:
Desktop has it owns repository which also has its docs in it
Android has no (current/up-to-date) documentation
IOS (don’t recall off-hand but check its repo)
Oh, and some of the apps that either aren’t shipped by default (or are, but aren’t sourced from the server repository) like Photos, Calendar, Tasks, etc. you’ll have to poke around at the https://github.com/nextcloud level to find their respective repositories if you wish to monitor their docs (which are typically READMEs, sometimes in doc subfolders, and sometimes in wikis).