`direnv help` for `version VERSION_AT_LEAST` is annoyingly misleading

Describe the bug This bug is minor and seems to have been around forever, but seems worth filing/fixing.

To Reproduce

direnv help includes:

version [VERSION_AT_LEAST]:
  prints the version or checks that direnv is older than VERSION_AT_LEAST.

where "older than" pretty much contradicts "VERSION_AT_LEAST".

Expected behavior This should say something like "... or checks that direnv is VERSION_AT_LEAST or newer".

Environment

• Direnv version: 2.37.1

Additional context

The main reason this is not a PR is that I haven't figured out what docs need updating when this string is changed.