[main] Doc issue in file modules/ROOT/pages/user.adoc

The instructions for authenticating with fkinit seem to be out-dated, at least as of Fedora 42. I do not see the described prompt at How do I get a kerberos ticket if I have two-factor authentication enabled?:

You will be presented with the following prompt, be sure to Enter your password first, followed by the OTP Token Value:
Enter OTP Token Value:

Instead, I'm prompted first for my FAS password, and then the OTP token:

$ fkinit --user bmr
🔐 FAS password: ••••••••••••••••••••••••••••••••••
🔐 FAS OTP (leave blank if not configured): ••••••                  

Ticket cache: KCM:XXXX:YYYYY
Default principal: bmr@FEDORAPROJECT.ORG

Valid starting     Expires            Service principal
19/05/25 15:02:36  20/05/25 15:02:35  krbtgt/FEDORAPROJECT.ORG@FEDORAPROJECT.ORG

This is actually simpler, and works great. I had no trouble figuring it out after enrolling the token. It's a small change to the docs but it might be simpler for new users to navigate.