PractitionerRole: Correct ANZSCO codesystem url

[dt-r]

There is an issue in the mapping for PractitionerRole.code.system

These are all ANZSCO codes but the system url varies across the set and is incorrect.

Correct url is: http://www.abs.gov.au/ausstats/abs@.nsf/mf/1220.0

But for example in:

• https://github.com/hl7au/au-fhir-test-data/blob/master/generated/Organization-annie-river-practice.json the url is http://www.abs.gov.au/ausstats/abs@.nsf/mf/1292.13
• https://github.com/hl7au/au-fhir-test-data/blob/master/generated/Organization-appin-pharmacy.json the url is http://www.abs.gov.au/ausstats/abs@.nsf/mf/1292.24

[StephThaoOng]

Fixed.