Bogus } in usage

[glensc]

Description of the problem, including code/CLI snippet

✖ gitlab event -h
usage: gitlab event [-h] {list} ...

options:
  -h, --help  show this help message and exit

action:
  list}      Action to execute on the GitLab resource.

Expected Behavior

There should be list

Actual Behavior

There is list}

Specifications

• python-gitlab version: 3.15.0
• API version you are using (v3/v4): None
• Gitlab server version (or gitlab.com): None