Add MacStadium blog post
Closes https://gitlab.com/gitlab-com/blog-posts/issues/256
Action items:
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Marcia review -
Pick a release date and change the filename -
Make the offer more prominent with a banner or something
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Closes https://gitlab.com/gitlab-com/blog-posts/issues/256
Action items: