nfc: update JTGT,NTGT,SSFT,TBWT to NZGD2000 coordinates - #2811

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/checkout@8e5e7e5ab8b370d6c329ec480221332ada57f0ab, actions/setup-go@fac708d6674e30b6ba41289acaab6d4b75aa0753. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

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