modules/understanding-upgrade-channels: Blocked update edges are still supported
modules/understanding-upgrade-channels: Blocked update edges are still supported

If we supported them at some point, we will continue to support the
edges even if they are no longer recommended.

vikram-redhat/openshift-docs,vikram-redhat/openshift-docs,vikram-redhat/openshift-docs,vikram-redhat/openshift-docs,vikram-redhat/openshift-docs