Add new license entry for Transport for NSW GTFS

[jjasloot]

License Template / Lizenz Vorlage

• I have read the license requirements in the README and I am sure that my contribution is compliant with the license requirements.
• I have checked my contribution for syntax errors

Country / Land

Australia: New South Wales

License / Lizenz

CC-BY

Source / Quelle

https://opendata.transport.nsw.gov.au/data/dataset/timetables-complete-gtfs

[github-actions]

Thank you for contributing a license to Träwelling! We'll review your pull request soon.

Here's our internal review checklist:

License requirements

• The license allows use, redistribution, and modification of the data
• The license does not require royalties or usage fees
• The license is not specific to a product or technology
• Any restrictions are clearly stated

Technical checks

• The source filename matches exactly what appears on traewelling.de/debug/motis-sources
• The data source URL is reachable and correct (or null and not relevant)