Change "Customize Forecast" language to "Clone" terminology

This has come up in the past, but I didn’t see it documented on our public roadmap — it would be good to rename the “Customize Forecast” terms to “Clone” or similar so that the terms match what’s happening for the user. Also flagging that we’ll need to update docs anytime stuff like this (big and small) changes, for example, it’d need to be updated in the example in the quickstart guide that uses the term Customize Forecast: