API consistency: Transactions.moreAvailable is a string

[johncrim]

As you can see here:

https://github.com/Mastercard/open-banking-us-openapi/blob/2a97ccde203a40330cdf42cfadcad4d2c9743511/openbanking-us.yaml#L36301

Transactions.moreAvailable is a string, whereas all the other *.moreAvailable properties are bool.

In an earlier version of the schema doc (eg 1.23.2) Transactions.moreAvailable was a bool, and that API schema version is still in use. So, this seems like an error that was introduced in the past few months, as opposed to a correction of an earlier error.

[Jadavpadma]

Thank you @johncrim , I will review the changes and get back to you