Make it possible to update Knative
Problem to solve
As a Sysadmin, in order to keep up with Knative developments and assure that I'm compatible with recent GitLab versions, I would like to be able to upgrade my Knative installations easily.
Knative is update-able today, there are simply no docs around it. The only recommendation is upgrade one version at a time. But
kubectl apply -f https://storage.googleapis.com/knative-releases/latest/release.yaml should be sufficient for upgrades.
- document how to upgrade Knative from 0.5 to 0.9 (or 1.0 if it already exists)