How many items are included now?

## Expected

> not limit the entries to any number

https://github.com/streetcomplete/StreetComplete/issues/3851#issuecomment-1061201960

## Actual

But the Readme states:
> It extracts all crops for each country and transforms the first fifteen crops listet into the YAML format.

## Solution

Likely a doc update + check implementation to see what is correct…