Commands called `update` Show Incorrect Documentation

Bug report form

• I have done a basic search of the issue tracker to find any existing issues that are similar.
• I have checked that my version is at least the latest stable release available via my installation method.

Describe the bug

When creating any command or subcommand named update, it will incorrectly show that it provides an update cells subcommand.

How to reproduce

1. Create a module providing a update command
   lol.nu:

   export def update [] {}
   
   export module test {
       export def update [] {}
   }
   

2. Notice how each command suggests the existence of a update cells command:

   use lol.nu
   lol update --help
   lol test update --help
   

Expected behavior

Only subcommands actually defined should appear.

Configuration

Reproduce the issue using the lol.nu module and the --help entry points shown in the report. Trace how help output derives subcommands for commands named update; done means only explicitly defined subcommands appear for both lol update --help and lol test update --help.