Uses gitlab-shell v3.6.6
What does this MR do?
Updates the upgrade documentation
Are there points in the code the reviewer needs to double check?
No
Why was this MR needed?
Because gitlab 8.13.0 requires gitlab-shell v3.6.6
Screenshots (if relevant)
Does this MR meet the acceptance criteria?
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CHANGELOG entry added -
Documentation created/updated -
API support added - Tests
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Added for this feature/bug -
All builds are passing
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Conform by the merge request performance guides -
Conform by the style guides -
Branch has no merge conflicts with master(if it does - rebase it please) -
Squashed related commits together