Documentation to upgrade existing Geo installations
We don't have a documentation about how to upgrade an existing Geo installations.
The steps are simple:
- log into each node (primary and secondaries)
- Upgrade GitLab
- Test primary and secondary node, and check version in each.
- That's it.
Even if the steps are dead simple, we should mention it on https://docs.gitlab.com/ee/gitlab-geo/README.html.