Forgot to make trees not spawn on ores

[brevven]

https://mods.factorio.com/mod/bzvery/discussion/640adc5a835d8a13f290098b

Checklist

• Lead
• Aluminum
• Tungsten
• Zirconium
• Silica & Silicon
• Titanium
• Tin
• Graphite & Diamonds
• Salt & Chlorine
• Noble Metals
• Natural Gas
• Foundry

    tree_removal_probability = 0.7,
    tree_removal_max_distance = 32 * 32,

  Changes:
    - Trees will spawn less often on resources.