Replacing the note field in Leads API with fields in Notes API

[Elina]

Effective from April 23, 2021

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What is going to change?

We will remove the note field from the following Leads API endpoints:

• GET /leads
• GET /leads/{id}
• POST /leads
• PATCH /leads/{id}

And add lead_id and pinned_to_lead_flag fields to GET /notes endpoint.
The note field will be removed on April 23, 2021. The support for multiple Notes is effective immediately.

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See the full announcement text and why this change was made in the Changelog.