updates for nmfs-opensci/py-rocket-geospatial-2 new location

[eeholmes]

• the pin-packages.yml and test-python.yml workflows should use the new location
• can now add the package size badge ![](https://ghcr-badge.egpl.dev/nmfs-opensci/py-rocket-geospatial-2/latest_tag?color=%2344cc11&ignore=latest&label=version&trim=)
• update any refs in documentation to use new location