writefreely user -h is missing --create-admin option

[rouilj]

Describe the bug

The --create-admin option is not shown/documented in writefreely

Steps to reproduce (if necessary)

Steps to reproduce the behavior:

1. type writefreely user -h
2. note that --create-admin is not listed

Expected behavior

--create-admin should be listed

Application configuration

• Single mode or Multi-user mode? Multi
• Database? sqlite
• Open registration? no
• Federation enabled? yes

Version or last commit: 0.13.2

[thebaer]

You'll find that under the user create sub-command:

$ writefreely user create -h
NAME:
   WriteFreely user create - Add new user

USAGE:
   WriteFreely user create [command options] [arguments...]

OPTIONS:
   --admin     Create admin user (default: false)
   --help, -h  show help (default: false)