Generate the release roadmap image for the download page
https://www.djangoproject.com/download/

like in https://devguide.python.org/versions/

Where the SVG is generated with a command instead of manual edited:

https://github.com/python/devguide/blob/main/_tools/generate_release_cycle.py#L119

I suggested imitating the automatic graph generation process as done in Python's devguide, but not copying also its graphics.

I want to preserve the style of the current graph but make it command-generated