Help: Add wolves race description

From https://forums.wesnoth.org/viewtopic.php?f=32&t=43721&start=75#p597028

[ci skip]

(cherry-picked from commit a67e068178)

data/core/units.cfg

@@ -360,7 +360,7 @@ While undead lords arrived on the Great Continent in considerable numbers only i
         name= _ "race^Wolf"
         female_name= _ "race+female^Wolf"
         plural_name= _ "race^Wolves"
-        description= "" # wmllint: ignore
+        description= _ "Wolves are predatory canines encountered frequently in the wilderness. Quick, tough, and durable, a solitary wolf suffices to maim or kill civilians and untrained soldiers with ease, but it is their tendency to travel in packs and attack in an organized manner that makes them particularly fearsome to travelers. They tend to stay away from civilization, though, only occasionally venturing close to prey upon livestock."
         num_traits=2
         undead_variation=wolf
         {ORCISH_NAMES}