Fix typo: atleast -> at least

[changeworld]

[prmerger-automator[bot]]

@changeworld : Thanks for your contribution! The author(s) and reviewer(s) have been notified to review your proposed change.

[learn-build-service-prod[bot]]

Learn Build status updates of commit c975a3b:

:white_check_mark: Validation status: passed

File	Status	Preview URL	Details
articles/migrate/how-to-create-group-machine-dependencies-agentless.md	:white_check_mark:Succeeded

For more details, please refer to the build report.

[habibaum]

Reviewed and the pr can be merged.