Create exchange yaml incorrect

[dlongley]

The incorrect section is here:

vc-api/exchanges.yml

Lines 313 to 334 in 5aff850

	CreateExchangeRequest:
	type: object
	description: Object containing information about the exchange to be created.
	properties:
	exchangeInformation:
	type: object
	properties:
	ttl:
	type: string
	description: Time to live for the exchange (ms).
	variables:
	type: array
	description: Template variables to be used in the exchange.
	items:
	type: object
	properties:
	type:
	type: string
	description: The type of template.
	template:
	type: string
	description: The template itself.

It should instead look something like this:

    CreateExchangeRequest:
      type: object
      description: Object containing information about the exchange to be created.
      properties:
        ttl:
          type: number
          description: Time to live for the exchange (seconds).
        variables:
          type: object
          description: Template variables to be used in the exchange.
        openId:
          type: object
          description: Optional parameters to enable OID4* protocol for delivery.