[SSL] Correcting AOP doc

[ngayerie]

PCX-19386

In the zone level doc:
remove the step #4 as the PUT is not needed if you enable on the UI

In the hostname level doc:
remove the step #3 as you don't need to enable AOP for the zone if you enable it per hostname with the API

[RebeccaTamachiro]

Checking with Product

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