fix(content): Change the Tractor Beam's description to use attractor …

…instead of repulsor technology (endless-sky#10891)

data/human/weapons.txt

@@ -410,7 +410,7 @@ outfit "Tractor Beam"
 		"reload" 1
 		"firing energy" 2.1
 		"firing heat" .8
-	description "The anti-gravity properties of repulsor engines started a revolution in human spaceflight during the 24th century, and it was not long before this technology was put to use elsewhere. Tractor beams utilize repulsor technology to allow ships to attract space debris to them, be that the ores from a recently mined asteroid, or the dumped cargo from a merchant ship fleeing for its life. This has led to tractor beams being a popular outfit among asteroid miners and pirates alike."
+	description "The anti-gravity properties of repulsor engines started a revolution in human spaceflight during the 24th century, but it was only relatively recently that engineers began experimenting with gravitational attraction. Tractor beams utilize rudimentary attractor technology to allow ships to attract space debris, be that the ores from a recently mined asteroid, or the dumped cargo from a merchant ship fleeing for its life. This has led to tractor beams being a popular outfit among asteroid miners and pirates alike."
 
 effect "tractor beam"
 	sprite "effect/tractor beam"