Update Geo Architecture Diagram in our documentation
What does this MR do?
This is just an update to the Geo Architecture Diagram present here: https://docs.gitlab.com/ee/administration/geo/replication/
The new Diagram is more in line with our docs page style and GitLab UI. It's the same image being used by the "How we Built Geo" blog post: gitlab-com/www-gitlab-com!13968 (merged)
closes gitlab-org/gitlab-ee#8592
Edited by Gabriel Mazetto