Buff scaling glow by 50%

Lots of issues with players being unable to figure out traversal
of dark caves.  Total darkness is probably too much of an ostacle
for players who haven't already learned how to avoid those kind
of circumstances.

mods/nc_scaling/api.lua

@@ -5,7 +5,7 @@ local ItemStack, minetest, nodecore, pairs, vector
 
 local modname = minetest.get_current_modname()
 
-nodecore.scaling_light_level = 2
+nodecore.scaling_light_level = 3
 
 function nodecore.scaling_particles(pos, def)
 	def = nodecore.underride(def or {}, {