Missing upgrade requirement about LeaseRevoke issues when migrating from 3.2 => 3.3

[Ramyak]

"NOTE: if you enable auth and use lease(lease ttl is small), it has a high probability to encounter issue that will result in data inconsistency. It is strongly recommended upgrading to 3.2.31+ firstly to fix this problem, and then upgrade to 3.3. In addition, if the user without permission sends a LeaseRevoke request to the 3.3 node during the upgrade process, it may still cause data corruption, so it is best to ensure that your environment doesn’t exist such abnormal calls before upgrading, see #11691 for detail."

This upgrade requirement is missing.

https://etcd.io/docs/v3.5/upgrades/upgrade_3_3/#upgrade-checklists does have it

https://etcd.io/docs/v3.3/upgrades/upgrade_3_3/#upgrade-checklists does not have it

[stale]

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