xero.accountingApi.getInvoice is not returning bill permit number in its response.

[allanchua101]

SDK you're using (please complete the following information):

• Version ^9.3.0-alpha.5

Describe the bug
Permit number is nowhere to be found on SDK response of either xero.accountingApi.getInvoice or xero.accountingApi.getInvoices APIs

[github-actions]

PETOSS-649

[github-actions]

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