[FEAT] Use python instead of python3 to call shape2osm.py to be macOS Monterey/M1 compatible

[treee111]

This PR…

• changes the call of shape2osm.py from python3 call to python
• there might be another way to get around this situation on the computer. Because python3 is already changed everywhere in the repo beside this one line, this is a logical step

Considerations and implementations

the error can be produced with a rather fresh macOS Monterey 12.4 on MBP M1 with: python -m wahoomc cli -co malta -md 100 -fp
and run via debugging this is the error:

this is the cause:

How to test

1. Run python -m wahoomc cli -co malta -md 100 -fp

Pull Request Checklist

• Reviewed the Contributing Guidelines
  • Especially the Pull-Requests section
• Commits (and commit-messages) are understandable
• Tested with macOS / Linux
• Tested with Windows