The Lubuntu manual currently has two main viewing options; with stable or lts in the URL intended to represent which version of the manual you actually want.
What is there now: Lubuntu 20.04 LTS & Lubuntu 22.04 LTS
- stable is where you’ll find the latest Lubuntu 22.04 LTS manual
- lts is where you’ll still find the Lubuntu 20.04 LTS manual
If you want an easy way to know which manual you’re looking at, the release the manual is for, is still viewable in the top left blue-background panel of your browser window, ie. where you search. A quick example of differences can be seen with these links: stable and lts
FYI: There is a third master option too, which is the current development release, currently that’s kinetic kudu or 22.10; so if using the development release (kinetic) this is possibly the best manual for you.