Partially update a form. Only the fields present in the request body are changed; omitted fields are left unchanged.
Nested objects must be sent complete, as they fully replace the stored value. Sending null for an optional field clears it,
while sending null for a mandatory field is rejected.
Form status and creation origin cannot be changed through this endpoint.

Games: a mysteryBox or scratchCard block adds an interactive game to the form. A form may contain
at most one game, it cannot be combined with a wheel of fortune, and the game's step must be placed before or
at the first step containing a required email or phone field. The game reward is revealed to the visitor
through a discount block of type game on the success step.

Scopes:
forms.write

Rate Limiting:
This endpoint is rate limited to 40 requests per minute.