update's the campfire's fire burning animation to make it look better (#4077)

improve the look of the campfire's flame/burning animation

Reviewed-on: MineClone2/MineClone2#4077
Reviewed-by: the-real-herowl <the-real-herowl@noreply.git.minetest.land>
Co-authored-by: Wbjitscool <dwsda121@gmail.com>
Co-committed-by: Wbjitscool <dwsda121@gmail.com>

mods/ITEMS/mcl_campfires/api.lua

@@ -282,7 +282,7 @@ function mcl_campfires.register_campfire(name, def)
 					type="vertical_frames",
 					aspect_w=32,
 					aspect_h=16,
-					length=2.0
+					length=0.8
 				 }}
 		},
 		overlay_tiles = {