When you go to https://docs.opendaylight.org/en/latest/ you see Potassium on the top of the page. But when you click on https://docs.opendaylight.org/projects/netconf/en/latest/index.html  you see Silicon.

Align netconf's docs version with distribution as follows:

1. master -> Potassium
2. 5.0.x -> Argon
3. 4.0.x -> Chlorine