Fix Apple's OS name to consistently be macOS (!43873) · Merge requests · GitLab.com / www-gitlab-com · GitLab

Why is this change being made?

Apple calls its OS macOS so we should too for consistency and to improve search.

Does this MR meet the acceptance criteria?

Assign to DRI

Did you assign this change to the correct DRI of the page or information you are changing?

Conformity

Added description to this MR explaining the reasons for the proposed change, per say-why-not-just-what